The Minus Five team find an unconscious diver in the water and another on the sea bed. Attempting a rescue, one of the team gets nitrogen narcosis and tries to give a shark boxing lessons.
| Name | Type | Role | |
|---|---|---|---|
| Joy Cavill | Writer | ||
| Vic Ley | Guest Star | Ron Grampian | |
| Malcolm McLeod | Guest Star | Mike Stewart | |
| Peter Maxwell | Director |