The Thomases have to pick up a corpse on a remote island, where a TV show contestant died. He was killed by a helium balloon. The family soon finds out the meaning why this island is called Island of Doom.
| Name | Type | Role | |
|---|---|---|---|
| Rhys Thomas | Writer | ||
| Peter Purves | Guest Star | ||
| Paul Whitehouse | Guest Star | ||
| Dudley Sutton | Guest Star | ||
| Christine Gernon | Director |