The People Against O'Hara

Spencer Tracy

James P. Curtayne

Pat O'Brien

Det. Vincent Ricks

Diana Lynn

Virginia 'Ginny' Curtayne

John Hodiak

District Attorney Louis Barra

Eduardo Ciannelli

Sol 'Knuckles' Lanzetta

James Arness

John Fordman 'Johnny' O'Hara

Yvette Duguay

Mrs. Katrina Lanzetta

Jay C. Flippen

Sven Norson