 Penelope, Tin-Tin, Parker and the Tracys return to Paradise Peaks, where Cass treats them to a private piano recital of "Dangerous Game".Filmed in November and December 1965, "The Cham-Cham" was the second-to-last episode of "Thunderbirds" Series One to be produced.Scriptwriter Alan Pattillo devised a show business plot and the exotic setting of the Paradise Peaks resort in an attempt to emulate classic Hollywood musicals.