Starring: Ed Bishop, Francis Matthews, Cy Grant, Donald Gray
Audio problem: After Colonel White thanks Captain Scarlet and Captain Blue at the start of the episodes, they reply with each other's voices.
Factual error: When we see the SPV escaping from the Culver Atomic Centre, it is night time. However, when we see Number 3 Tracking Vehicle, it has changed back to daytime.
Trivia: This episode features flashback footage from "Big Ben Strikes Again", "Crater 101", "The Trap" and only eleven minutes of new material. The flashback to "Crater 101" also features a flashback of its own.
Question: How does Spectrum recover its wrecked SPVs?