- "They say that if you go down well at Paradise Peaks, you'll go down well anywhere"
— Aloysius Parker
Brains determines that someone is using a Cham-Cham to edit the music of a popular band and use it to send details of strikes against military aircraft every time the song is broadcast. To find and stop the one responsible, Lady Penelope and Tin-Tin go undercover to the band's next performance at a Hotel in the Swiss Alps.
- Main article: The Cham-Cham/Storyline
- Main article: The Cham-Cham/Transcript
- Jeff Tracy - Peter Dyneley
- Scott Tracy - Shane Rimmer
- Lady Penelope Creighton-Ward - Sylvia Anderson
- Virgil Tracy - David Holliday
- Alan Tracy - Matt Zimmerman
- Brains - David Graham
- Parker - David Graham
- Tin-Tin Kyrano - Christine Finn
- John Tracy - Ray Barrett
- Grandma Tracy - Christine Finn
- Cass Carnaby - Ray Barrett
- Olsen - David Graham
- Matthews Field Commander - Ray Barrett
- Maxie - John Tate
- Banino - Matt Zimmerman
- Captain Savidge - David Graham
- Scheiler - John Tate
- Hitchins - David Graham
- Macklin - Matt Zimmerman
- Foreign Colonel - John Tate
- Foreign Lieutenant - Matt Zimmerman
- Radio Maxwell DJ - Ray Barrett
- Telephone Operator (not seen on screen, voice only) - Christine Finn
- Paradise Peaks Hotel Guests
- Paradise Peaks Hotel Receptionist
- The Cass Carnaby Five band members
- RTL-2 Co-Pilot
- 3rd Assistant Controller
International Rescue Equipment UsedEdit
Non-International Rescue Equipment UsedEdit
- Air Sea Rescue Base
- Foreign Air Force Base
- International Artistes Management Ltd
- Laboratory Rooms (Tracy Island)
- Matthews Field Air Base
- Olsen's Chalet
- Paradise Peaks Hotel
- The RTL-2 Transport Aircraft in this episode would later be slightly remodelled and repainted for use in the Anderson's next series, Captain Scarlet & The Mysterons.
- When the three Unidentified Fighter Jets take off, two of them are connected by a stick, in order to ease the task of the puppeteers. Although the stick itself is hidden from view, the shadow it casts on the runway is clearly visible.
- Having flown all the way to Matthews Field Air Base, Scott askes for permission to land by radio, then talks to the control tower by Megaphone.
- Shortly after the cables for the cable car have been cut, you see the cable car speeding down its route with visible masts holding the cables up, but when Thunderbird 2 is lowering the cables to Parker (standing on the cable cars roof while in motion) you dont see any masts holding the cables up. Furthermore when Parker is attaching the cables the masts would of preventing such a rescue in this fashion.
For a contemporary (or at least in the 1990's) audience, Thunderbirds underwent a repackage, redub, and rebroadcast as part of FOX Kids' Saturday morning line-up. Due to a severe decline in ratings, only half of the episodes made it to broadcast before the series was pulled by the network. As a result, the modified version of The Cham-Cham never aired, and remains among a handful of missing Thunderbirds episodes to this day.
- French: Message en musique
- German: Der Chamcham-Trick
- Spanish: La máquina musical
- Italian: Missione in montagna
- Dutch: Cham-cham (TV 1967); Gevaarlijk vermaak in Paradise Peaks (TV 1992); De Cham-Cham (VHS, DVD)
- Japanese: 魅惑のメロディー