The Saurians plot to destroy the Searcher and start a galactic war by infiltrating the starship and a space station in human disguise. Only Buck, who has contracted a strange virus, is able to see the true form of the Saurians, but no one believes him. When the Suarians realize that Buck is a threat to them, he becomes the target of their assassination attempts.
| Name | Type | Role | |
|---|---|---|---|
| Francis Moss | Writer | ||
| Sr. | Guest Star | ||
| Paul Carr | Guest Star | ||
| Linden Chiles | Guest Star | ||
| Barry Cahill | Guest Star | ||
| Frank Parker | Guest Star | ||
| Vernon Weddle | Guest Star | ||
| Andrea Pike | Guest Star | ||
| Kim Hamilton | Guest Star | ||
| Alex Hyde-White | Guest Star | ||
| Stacy Keach | Guest Star | ||
| Allan Hunt | Guest Star | ||
| Barry Crane | Director |