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

Virginia Gregg
(voice) / Marjorie Lewis / Millie (voice) (uncredited) / Mrs. Doris Roth / Evely...

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

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

Paul Richards

Sam Edwards

Helen Kleeb

Martin Milner
/ Stephen Banner

Don C. Harvey
/ Capt. Donahoe

Harlan Warde

Howard Culver

Dennis Moore