The planet Frontios, in the distant future. Following Earth's destruction, a tiny colony struggles to eke out a life on this desolate world. But where do the bombardments that threaten them originate from? Little does the Doctor suspect that somewhere nearby lurks a power capable of ripping even the TARDIS apart…
| Name | Type | Role | |
|---|---|---|---|
| Christopher Bidmead | Writer | ||
| Maurice O'Connell | Guest Star | ||
| Richard Ashley | Guest Star | ||
| Peter Gilmore | Guest Star | ||
| William Lucas | Guest Star | ||
| Jeff Rawle | Guest Star | ||
| Ron Jones | Director |