Polly discovers that the Cybermen are abducting the plague victims, but nobody believes her until it is too late.
| Name | Type | Role | |
|---|---|---|---|
| Kit Pedler, Gerry Davis | Writer | ||
| John Wills | Guest Star | ||
| Alan Wells | Guest Star | ||
| Peter Greene | Guest Star | ||
| Victor Pemberton | Guest Star | ||
| André Maranne | Guest Star | ||
| Patrick Barr | Guest Star | ||
| Edward Phillips | Guest Star | ||
| Denis McCarthy | Guest Star | ||
| Michael Wolf | Guest Star | ||
| Leon Maybank | Guest Star | ||
| Derek Calder | Guest Star | ||
| Arnold Chazen | Guest Star | ||
| Ron Pinnell | Guest Star | ||
| Robin Scott | Guest Star | ||
| Morris Barry | Director |