Season Three
- #70: The Case of the Spurious Sister 10/3/59
- Karl Weber as Bruce Chapman
- Mary La Roche as Grace Norwood
- Marion Marshall as Ginny Hobart
- Marianne Stewart as Helen Sprague
- Peggy Knudsen as Marie Chapman
- James Seay as Ralph Hibberly
- Charles Cooper as Greg Evans
- Robert Osterloh as Walter Sprague
- John Launer as Judge
- Charles Davis as Hotel Clerk
- Michael Fox as Autopsy Surgeon
- Nancy Evans as Switchboard Operator
- Sam Edwards as Cashier
- George E. Stone as Court Clerk
- #71: The Case of the Watery Witness 10/10/59
- Fay Wray as Lorna Thomas
- Douglas Dick as Fred Bushmiller
- Malcolm Atterbury as Dennis Briggs
- Lester Vail as Tony Raeburn
- Dusty Anders as Betty Clark
- John Bryant as George Clark
- Kathryn Card as Harriet Snow
- Charles J. Conrad as Judge
- Ned Glass as Mr. Smith
- Pat Moran as Court Clerk
- Paul B. Kennedy as Court Stenographer
- #72: The Case of the Garrulous Gambler 10/17/59
- Dick Foran as Steve Benton
- Paula Raymond as Doris Shackley
- Steve Brodie as Ben Wallace
- Wynn Pearce as Larry Benton
- Tony Travis as Johnny Clay
- Victor Sen Yung as Mickey Fong
- Anne Barton as Nora Bradley
- Gordon Wynn as Mike Granger
- Morris Ankrum as Judge
- Law Green as Doctor Victor
- Irving Steinberg as Sergeant
- Robert Nash as Earnshaw
- #73: The Case of the Blushing Pearls 10/24/59
- Nobu McCarthy as Mitsou Kamuri
- Christine White as Alice Carson
- Benson Fong as Itsubi Nogata
- George Takei as Toma Sakai
- Steve Terrell as Grove Nichols
- Angela Greene as Thelma Nichols
- Ralph Dumke as Hudson Nichols
- John Gallaudet as Municipal Judge
- Joe De Reda as Edgar Beals
- Rollin Moriyama as Ito Kamuri
- John Barclay as Judge
- Bill Walker as Watchman
- Lia Waggner as Maid
- Tom Wilde as Detective
- Jack Carol as Technician
- Martha Wentworth as Landlady
- #74: The Case of the Startled Stallion 10/31/59
- Paul Richards as Earl Mauldin
- Elliot Reid as Terry Blanchard
- Trevor Bardette as John Brant
- Patricia Hardy as Jo Ann Blanchard
- Melora Conway as Clara Hammon
- Richard Rust as Peter White
- Harry Tyler as "Pop" Abbott
- Morris Ankrum as Trial Judge
- Arthur Hanson as Coroner
- John Harmon as Fingerprint Man
- Don Dillaway as Charley Cass
- Howard Hoffman as Minister
- Holly Harris as Actress
- Hal Hopper as Veterinarian
- Dick Keene as Process Server
- George E. Stone as Court Clerk
- Lee Miller as Sgt. Brice
- #75: The Case of Paul Drake's Dilemma 11/14/59
- Vanessa Brown as Donna Kress
- Basil Ruysdael as Henry W. Dameron
- Bruce Gordon as Frank Thatcher
- Dean Harens as Tad Dameron
- Simon Scott as Charles Dameron
- Jennifer Howard as Judith
- Sheila Bromley as Mrs. Colin
- Robert Lieb as Joe Marsden
- Robert Cornthwaite as Anders
- Kenneth MacDonald as Judge
- Norman Leavitt as Ballistics Expert
- Ralph Moody as Jacob Wiltzy
- Robert Bice as Private Detective
- James Callahan as 1st Policeman
- William Hughes as 2nd Policeman
- George E. Stone as Court Clerk
- Ann Bellamy as Margo
- Steve Stevens as Paper Boy
- #76: The Case of the Golden Fraud 11/21/59
- Arthur Franz as Richard Vanaman
- Alan Hewitt as Fred Petrie
- June Dayton as Frances Vanaman
- Neil Hamilton as Henry Noble
- Alex Gerry as Hale
- Patricia Huston as Doris Petrie
- Joyce Meadows as Sylvia Welles
- Asa Maynor as Bunny Lee
- David Sheiner as Rip Conners
- S. John Launer as Judge
- Thom Carney as Officer
- Pitt Herbert as Autopsy Surgeon
- Frank Sully as Delivery Man
- George E. Stone as Court Clerk
- #77: The Case of the Bartered Bikini 12/5/59
- John Lupton as Wally Dunbar
- June Vincent as Madge Wainwright
- Rita Lynn as Lisa Ferrand
- Terry Huntingdon as Kitty Wynne
- Paul Langton as Simon Atley
- Stephen Bekassy as Rick Stassi
- John Anderson as Bud Ferrand
- Victor Rodman as Watchman
- Herbert Patterson as Macready
- Richard Gaines as Judge
- Maura McGiveney as Yvonne
- Robert Bice as Drake's Operative
- William Idelson as Police Technician
- Pitt Herbert as Doctor
- George E. Stone as Court Clerk
- Don Anderson as Attorney
- #78: The Case of the Artful Dodger 12/12/59
- William J. Campbell as Allen Sheridan
- Patricia Donahue as Joyce Fulton
- Lurene Tuttle as Sarette Winslow
- Jerome Cowan as Victor Latimore
- Peter Leeds as Lou Caporale
- Douglas Henderson as Ralph Curtis
- Nelson Leigh as Judge
- Michael Fox as Autopsy Surgeon
- Vera Marshe as Maid
- Ken Patterson as Technician (Fred)
- George E. Stone as Court Clerk
- Terry Loomis as Doris
- Max Wagner as Gate Officer
- Cosmo Sardo as Maitre De
- #79: The Case of the Lucky Legs 12/19/59
- John Archer as J. R. Bradbury
- Lisabeth Hush as Marjorie Cluny
- Jeanne Cooper as Thelma Hill
- Michael Miller as Bob Doray
- Doreen Lang as Mrs. Fields
- Douglas Evans as Frank Patton
- John Launer as Judge
- Pitt Herbert as Dr. James Latham
- Ray Kellogg as George Sanborne
- Sid Tomack as Night Clerk
- Rennie McEvoy as Emcee
- Leo Needham as Policeman
- Arthur Marshall as Art Store Clerk
- Pat Moran as Court Clerk
- #80: The Case of the Violent Village 1/2/60
- Barton MacLane as Sheriff Eugene Norris
- Ann Rutherford as Judith Thurston
- Jacqueline Scott as Kathi Beecher
- Ray Hemphill as Phil Beecher
- Bart Burns as Norman Thurston
- Richard Hale as Robert Tepper
- John Dennis as Ward Lewis
- Terry Becker as Everett Ransome
- Willis B. Bouchey as Judge
- Ina Victor as Charlotte Norris
- Jason Johnson as Clerk
- Frank Hagney as 2nd Man
- Robert R. Stephenson as 1st Man
- Cecil Weston as Court Reporter
- #81: The Case of the Frantic Flyer 1/9/60
- Patricia Barry as Janice Atkins
- Simon Oakland as Howard Walters
- Rebecca Welles as Carol Taylor
- James Bell as Zack Davis
- Virginia Vincent as Ruth Walters
- Ed Kemmer as Roger Porter
- Wilton Graff as Wade Taylor
- Richard Gaines as Judge
- Jon Lormer as Autopsy Surgeon
- Joey Faye as Motel Manager
- George E. Stone as Court Clerk
- Barry Brooks as Hastings
- #82: The Case of the Wayward Wife 1/23/60
- Marshall Thompson as Arthur Poe
- Bethel Leslie as Sylvia Sutton
- Frank Maxwell as Harry Scott Wilson
- Madlyn Rhue as Marian Ames
- Alex Davion as Gilbert Ames
- Richard Shannon as Ben Sutton
- I. Stanford Jolley as Alan Kirby
- Kenneth R. MacDonald as Judge
- Kathleen Mulqueen as Miss Croft
- Law Green as Autopsy Surgeon
- George E. Stone as Court Clerk
- Peter Hayman as Clerk (Bookstore)
- Irving Steinberg as Cabbie
- Craig Duncan as Sgt. Townley
- #83: The Case of the Prudent Prosecutor 1/30/60
- Philip Bourneuf as Asa Culver
- J. Pat O'Malley as Jefferson Pike
- Barbara Fuller as Joan Leonard
- Ruta Lee as Vita Culver
- Walter Coy as Denver Leonard
- Dabbs Greer as Hal Kirkwood
- Dennis Patrick as Prosecutor
- Ron Foster as Fred Pike
- Frank Albertson as Duck Hunter
- S. John Launer as Judge
- Michael Fox as Autopsy Surgeon
- Edd Stoddard as 2nd Hunter
- John Alonzo as Guitterez
- Paul B. Kennedy as Court Reporter
- #84: The Case of the Gallant Grafter 2/6/60
- Charles Aidman as Arthur Siddons
- Fintan Meyler as Patricia Martin
- Herbert Rudley as Edward Nelson
- Virginia Arness as Sylvia Nelson
- John Stephenson as Frank Avery
- Phillip Terry as Robert Doniger
- Charlotte Austin as Norma Williams
- Nelson Leigh as Judge
- Henry Hunter as Banker
- Eve McVeagh as Saleswoman
- John Alvin as Bank Teller
- Joan Staley as Judith
- George E. Stone as Court Clerk
- #85: The Case of the Wary Wildcatter 2/20/60
- Douglas Kennedy as Lucky Sterling
- Barbara Bain as Madelyn Terry
- Byron Palmer as Charles Houston
- Lori March as Paula Wallace
- King Calder as Floyd Gordon
- Harry Jackson as Roger Byrd
- Richard Gaines as Judge
- Larry Blake as Officer
- Anthony De Mario as Dealer
- George E. Stone as Court Clerk
- Lee Miller as Sgt. Brice
- #86: The Case of the Mythical Monkeys 2/27/60
- Beverly Garland as Mauvis Meade
- Lawrence Dobkin as Gregory Dunkirk
- Louise Fletcher as Gladys Doyle
- Lew Gallo as Richard Gilman
- Joan Banks as Mrs. Manley
- Norman Fell as Caspar Pedley
- John Reach as Dukes Lawton
- Nelson Leigh as Judge
- Bill Erwin as Morrison Findlay
- Bill Boyett as Kelton
- Frances Morris as Miss Carlisle
- Paul Lees as Parking Lot Attendant
- Ralph Brooks as Headwaiter
- George E. Stone as Court Clerk
- #87: The Case of the Singing Skirt 3/12/60
- Joan O'Brien as Betty Roberts
- Henry Lascoe as George Anclitus
- Allison Hayes as Sadie Bradford
- H. M. Wynant as Wilton (Slim) Marcus
- Jeanne Moody as Vivian Ennis
- Fredd Wayne as William Gowrie
- Chris Warfield as Manning Ennis
- Robert B. Williams as Police Captain
- Richard Gaines as Judge
- Stafford Repp as Frederick Halstead
- Byron Morrow as Thomas Ranger
- John Harmon as Frank Wilton
- Michael Fox as Autopsy Surgeon
- Harry Fleer as Detective
- Ken Walken as Parking Lot Attendant
- George E. Stone as Court Clerk
- #88: The Case of the Bashful Burro 3/26/60
- Ray Stricklyn as Gerald Norton
- Elisabeth Fraser as Hazel Bascombe
- George Mitchell as Amos Catledge
- Sue George as Sally Norton
- Ben Wright as Crawford Wright
- Charles Bateman as Roy Dowson
- Hugh Sanders as Ken Bascombe
- Wendell Holmes as District Attorney Williams
- John Pickard as Sheriff Keller
- Lewis Martin as Judge
- Kay Kuter as Deputy
- Jack Orrison as Coroner's Physician
- Stephen Courtleigh as Ballistics Expert
- Mike Mason as Cowboy
- Joan Elliott as Button Salesgirl
- Tony Michaels as Waiter
- #89: The Case of the Crying Cherub 4/9/60
- Joe Maross as David Lambert
- Tom Drake as Richard Harkens
- Abraham Sofaer as Sylvester Robey
- Mala Powers as June Sinclair
- David Lewis as Deputy D.A. Mark Hanson
- Kathryn Givney as Amelia Harkens
- Carmen Phillips as Liza Carson Lambert
- Thomas McBride as Thomas Clark
- Richard Gaines as Judge
- Isabel Randolph as Mrs. Vandercord
- Elvia Allman as Mrs. Forbes
- Elizabeth Harrower as Woman Artist
- Lee Miller as Sgt. Brice
- Patrick Waltz as Policeman
- Jack Perrin as Bidder #1
- Mary Benoit as Bidder #2
- Helene Heigh as Club Woman
- George E. Stone as Court Clerk
- #90: The Case of the Nimble Nephew 4/23/60
- Robert Gist as Deputy D.A. Claude Drumm
- William H. Wright as Adam Thompson
- Carl Benton Reid as Victor Logan
- Bert Convy as Harry Thompson
- Crahan Denton as Frank Jarrett
- Linda Leighton as Ellen Foster
- Myrna Fahey as Lydia Logan
- S. John Launer as Judge
- Joel Lawrence as Elliott Carter
- Warren Frost as Technician
- Michael Fox as Autopsy Surgeon
- Sam Flint as Banker
- Ted Stanhope as Realtor
- George E. Stone as Court Clerk
- #91: The Case of the Madcap Modiste 4/30/60
- John Conte as Charles Pierce
- Marie Windsor as Flavia Pierce
- Les Tremayne as Deputy D.A. Stewart Linn
- Leslie Parrish as Hope Sutherland
- David White as Henry De Garmo
- Robert Ellenstein as Medical Examiner
- Dorothy Neuman as Leona Durant
- Edward Mallory as George Halliday
- Truman Bradley as Narrator
- Morris Ankrum as Judge
- George E. Stone as Court Clerk
- Lee Miller as Sgt. Brice
- Anna Belle George as Model #1
- Pat Olson as Model #2
- #92: The Case of the Slandered Submarine 5/14/60
- Hugh Marlowe as Cmdr. James Page
- Robert F. Simon as Anthony Beldon
- Jack Ging as Robert Chapman
- Mort Mills as Barry Scott
- Robert H. Harris as Gordon Russell
- Edward Platt as Cmdr. Driscoll
- Russ Conway as Cmdr. Jerome Burke
- Robert Brubaker as Lou Hansford
- Ann Robinson as Vivian Page
- Stephen Chase as Cmdr. Foyle
- William Tannen as Lt. Cmdr. Matt Stewart
- Joseph Corey as Johnny Larkin
- Tom Palmer as Cmdr. Reynolds
- Herb Vigran as Ernest Pritchard
- Raoul DeLeon as Julio Remarto
- Freeman Lusk as Capt. Horton
- Richard Geary as O.N.I. Officer
- Dean Casey as Shore Patrolman
- #93: The Case of the Ominous Outcast 5/21/60
- Robert Emhardt as J. J. Flaherty
- Jeremy Slate as Bob Lansing
- Maggie Hayes as Vivian Bell
- Denver Pyle as Tom Quincy
- Walter Burke as James Blackburn
- Irene Tedrow as Amy Douglas
- Claude Stroud as Jeff Douglas
- Henry Norell as Frederick Bell
- Willis B. Bouchey as Judge
- Jack Holland as Autopsy Surgeon
- David McMahon as Bartender
- Mary Eastman as Secretary
- #94: The Case of the Irate Inventor 5/28/60
- Tom Coley as James Frazer
- Kasey Rogers as Lois Langley
- Ken Lynch as Robert Hayden
- Manning Ross as Calvin Boone
- Ce Ce Whitney as Thelma Frazer
- Doug Odney as Arthur Hayden
- Barry Cahill as Sgt. M. Quimby
- Kenneth R. MacDonald as Judge
- Gertrude Flynn as Mrs. Nichols
- Arthur Peterson as Sorrell
- George E. Stone as Court Clerk
- #95: The Case of the Flighty Father 6/11/60
- Anne Benton as Trudy Holbrook
- Hayden Rorke as Jay Holbrook #1
- Francis X. Bushman as Lawrence King
- Henry Beckman as David
- William Allyn as Wally Harper
- Berry Kroeger as Donald J. Evanson
- Francis De Sales as Holbrook #2
- Dan Riss as Peter Sample
- Grandon Rhodes as Judge
- Tom Fadden as Gus Nickels
- Arthur Hanson as Autopsy Surgeon
- Betty Farrington as Housekeeper
- Gail Bonney as Maid
- Paul B. Kennedy as Court Reporter
- George E. Stone as Court Clerk