- Kathleen Freeman - Nelly
- William Benedict - Albert
- John Zaremba - Chief Watson
- Douglas Evans - Pilot
- Strother Martin - Co-Pilot
- Michael Fox - Dr. Serny
- Watson Downs - Mayor
- Lee Phelps - City Engineer
- Roy Engel - Gen. Behan
- John Dodsworth - Dr. Carthwright
- Charles Williams - Cabbie
- Michael Granger - Kenneth Smith
- Jarma Lewis - Stewardess
- Elizabeth Root - Joy
- Juney Ellis - Spinster
- Curt Siodmak
- Curt Siodmak
- Ivan Tors
- Ivan Tors
- Paul Beaver
Capítulo disponible en las siguientes plataformas: