The Doctor acquires a sample of the web, but when he, Jamie and Victoria return to the HQ to examine it, they discover that Professor Travers has been abducted by the Yeti!
| Name | Type | Role | |
|---|---|---|---|
| Mervyn Haisman, Henry Lincoln | Writer | ||
| Jeremy King | Guest Star | ||
| Rod Beacham | Guest Star | ||
| Colin Warman | Guest Star | ||
| Douglas Camfield | Director |