Lady Penelope Creighton-Ward (voice)

Brains / Parker / Olsen / Captain Savidge / Hitchins (voice)

Jeff Tracy (voice)

Scott Tracy (voice)

Virgil Tracy (voice)

Alan Tracy / Banino / Macklin / Foreign Lieutenant (voice)

John Tracy / Cass Carnaby / Commander, Matthews Field / Radio Maxwell DJ (voice)

Tin-Tin Kyrano / Grandma Tracy (voice)

Maxie / Scheiler / Foreign Colonel (voice) (uncredited)