While helping set up an earthquake warning system Steve encounters a towering monster--and its mysterious masters.
| Name | Type | Role | |
|---|---|---|---|
| Kenneth Johnson | Writer | ||
| Charles Cyphers | Guest Star | ||
| Donn Whyte | Guest Star | ||
| Ford Lile | Guest Star | ||
| Chuck Bowman | Guest Star | ||
| Stefanie Powers | Guest Star | ||
| Hank Brandt | Guest Star | ||
| Severn Darden | Guest Star | ||
| Penelope Windust | Guest Star | ||
| Alan Crosland | Director | ||
| André Roussimoff | Actor |