A deadly, radioactive 16½ inch cylinder, released into the sea near the Great Barrier Reef from the crippled spacecraft Apollo 13, must be recovered and contained before the whole area becomes a graveyard. The assignment is given to the Minus Five team.
| Name | Type | Role | |
|---|---|---|---|
| Lee Robinson | Writer | ||
| Tom Farley | Guest Star | Professor Martin | |
| Peter Maxwell | Director |