The cinema film was an expanded re-working of the original pilot, A Magnum For Schneider taking much of its new material from the likewise expanded novelization of its teleplay, originally published as Red File for Callan, also by James Mitchell. However, the film's credits give only the novel as source (no mention is made of the pilot teleplay or the TV series),
| Name | Type | Role | |
|---|---|---|---|
| James Mitchell | Writer | ||
| Catherine Schell | Guest Star | ||
| Don Sharp | Director |