Gary Coleman plays the son of a U.S. diplomat who imagines himself in fantastic situations.
| Actor | Role |
|---|---|
 Gary ColemanD. C. Collins | D. C. Collins |
 Bernie CaseyJ.T. Collins | J.T. Collins |
 Shelley SmithAnn Harris | Ann Harris |
 Fred DryerBarney Daniels | Barney Daniels |
 Pamela AdlonTatyana (as Pamela Segall) | Tatyana (as Pamela Segall) |
 Jason BatemanAddison Cromwell | Addison Cromwell |
 Luis ÁvalosCabbie | Cabbie |
 Philip AbbottManning | Manning |
 Marilyn McCooVanessa Collins | Vanessa Collins |
 Harvey JasonDutch | Dutch |
 George GobelBergman | Bergman |
 Michael AnsaraTurk | Turk |
 Jan TřískaDeputy Markov | Deputy Markov |
 Lewis van BergenDenker | Denker |
 George DickersonUnderwood | Underwood |
 Jim BeggMan | Man |
| SSteve DoubetChief Radio Technician | Chief Radio Technician |
 Richard EpcarRadio Operator | Radio Operator |
| GGulcin GilbertCab Passenger | Cab Passenger |
 Adam GregorTorcheva | Torcheva |
| JJohn MansfieldMr. Underwood | Mr. Underwood |
 Joshua John MillerFrançois | François |
 Rance HowardPoliceman | Policeman |
 John Richard PetersenDoorman (uncredited) | Doorman (uncredited) |