James Franciscus
Det. Jimmy Halloran (39 eps)
Harry Bellaver
Det. Frank Arcaro (39 eps)
Horace McMahon
Lt. Michael 'Mike' Parker (39 eps)
Herbert B. Leonard
Narrator (39 eps)
John McIntire
Lt. Daniel Muldoon (39 eps)
Johnny Seven
Al Lacey (3 eps)
George Maharis
Stroke Strokirch (3 eps)
Michael Strong
Det. Hal Perleman (2 eps)
Frank Sutton
Aces (uncredited) (2 eps)
Phyllis Hill
Betty Fleischman (2 eps)
Rocky Graziano
Lou Curtis (2 eps)
Diane Ladd
Yankee Cretias (2 eps)
Frank Campanella
Cameraman (2 eps)
Rochelle Oliver
Cora Gary (2 eps)
Diana Douglas
Hilda Wallace (2 eps)
James Barton
Bo Giles (2 eps)
Rudy Bond
Lt. Mike Daniels (2 eps)
Arnold Merritt
Larry Peters (2 eps)
Vincent Gardenia
Musso (2 eps)
Mike Kellin
Billy Ketch (1 eps)
Michael Tolan
Det. Alan Keller (1 eps)
Al Lewis
Mr. Pike (1 eps)
Mel Ruick
Mr. Harding (1 eps)
Kent Smith
George Blake (1 eps)
Michael Conrad
Hartog (1 eps)
Jack Klugman
Patrolman Mike Greco (1 eps)
Louis Guss
Skull (1 eps)
Ludwig Donath
Owner of Pawnshop (1 eps)
Lee Philips
Larry Hine (1 eps)
Dorothy Peterson
Mrs. Graither (1 eps)
Michael Ansara
Rafael Valente (1 eps)
John Karlen
Chuck (1 eps)
Carlos Montalbán
Frank Baker (1 eps)
Mark Rydell
Ralph Harris (1 eps)
Peter Falk
Extortionist (1 eps)
Cara Williams
Lois Heller (1 eps)
House Jameson
Morgan (1 eps)
David Winters
Marty Nemo (1 eps)
Al Hodge
Johnson (1 eps)
John McQuade
Cassidy, Gangster (1 eps)
Bernard Kates
Bobby Madison (1 eps)
Simon Oakland
Duke (1 eps)
Jay Novello
Gio Bartolo (1 eps)
Diana Van der Vlis
Linda Stephenson (1 eps)
Richard X. Slattery
Solid (1 eps)
Eugenie Leontovich
Katina Cretias (1 eps)
Richard Jaeckel
Lance (1 eps)
Robert Alda
Jess Burton (1 eps)
Martin Balsam
Arnold Fleischman (1 eps)
Gary Morgan
Paulie (1 eps)
Kirk Alyn
Sgt. Muller (1 eps)
Vic Morrow
David Greco (1 eps)
Henry Hull
Alky (1 eps)
Louis Nye
The Drunk (1 eps)
Norma Crane
Fay Roberts (1 eps)
Lawrence Tierney
Mike Jensen (1 eps)
Irene Dailey
Amy Gary (1 eps)
Nehemiah Persoff
Barney Peters (1 eps)
Romo Vincent
Teddy Simpson (1 eps)
Woodrow Parfrey
Andrew Eisert (1 eps)
Bernard Fein
Dasher (1 eps)
Ross Martin
Carlo Ramirez (1 eps)
Joseph Ruskin
'Count' John Baker (1 eps)
Harry Guardino
Johnny Mills (1 eps)
John C. Becher
Doctor (1 eps)
Jeanette Nolan
Kate Blake (1 eps)
Jean Muir
Mrs. Klint (1 eps)
Robert Weil
Happy (1 eps)
Jan Norris
Doris Giles (1 eps)
Jan Miner
Elsie Knauf (1 eps)
Clifton James
George Haskel (uncredited) (1 eps)