 ", which had been filmed immediately prior, this episode's technical complexity caused production to end behind schedule and considerably over-budget.To make up for the lost time and extra costs, the scriptwriters turned the final episode of Series One into a clip show, "Security Hazard", which would make extensive use of flashbacks to earlier episodes to reduce the amount of new footage that would need to be filmed.Sylvia Anderson considered "The Cham-Cham" to be one of the series' best episodes and a rival to "Attack of the Alligators!"