- From the story by:
- Lewis R. Foster
- From the screen adaptation by:
- Sidney Buckman
- Broadcast version by:
- Peter Creswell
- Production:
- Peter Creswell
- Jefferson Smith, United States Senator:
- James Edmunds
- Saunders, his secretary:
- Barbara Blair
- Senator Joseph Payne:
- Leo McCabe
- Diz Moore, Washington correspondent:
- Fred O'Donovan
- President of the Senate:
- MacDonald Parke
- James Taylor, a political boss:
- Kent Stevenson
- A radio commentator:
- David Miller
- Mrs Smith:
- Ethel Lodge
- Chick McGann:
- Leslie Bradley
- Reporters, Senators, page-boys, citizens, etc.:
- The Cast