Investigating the impeller shaft, Van Lutyens is overwhelmed by the weed creature. A call comes from one of the off-shore rigs – the weed creatures are attacking and taking over!
| Name | Type | Role | |
|---|---|---|---|
| Victor Pemberton | Writer | ||
| John Gill | Guest Star | ||
| Brian Cullingford | Guest Star | ||
| Margaret John | Guest Star | ||
| Richard Mayes | Guest Star | ||
| Hugh David | Director |