Jack Webb
Joe Friday

Ben Alexander
Frank Smith

Olan Soule

Vic Perrin

Jack Kruschen

Art Balinger
Capt. Glavas / Capt. Barnard

Harry Bartell
Frank Salazar

Art Gilmore
/ Capt. Harry Didion

Herb Vigran
/ Eugene Murray / Pete Eigen / Sam Phillips / Jocko Harris

Virginia Gregg
(voice) / Millie (voice) (uncredited) / Evelyn Monroe / Audrey Thompson / Minna ...

William Boyett
/ Stanley Bushing (as Bill Boyett) / Larry Thompson (as Bill Boyett)

Natalie Masters
Edith Barson / Jean Dunbar / Peggy Herman / Katy Stokes / Doris Lanpher /

Paul Richards

Sam Edwards

Helen Kleeb

Martin Milner
/ Stephen Banner

Don C. Harvey
/ Capt. Donahoe

Harlan Warde

Howard Culver

Dennis Moore