Thunderbirds Are Go - Alan Tracey and Thunderbird 3
Thunderbirds Are Go - Alan Tracey and Thunderbird 3 ©2015 ITV Studois/ Pukeko Pictures

In Thunderbirds Are Go 121 Virgil and Alan intervene when a thrill seeking businessman flies his extravagant space yacht directly into the tail of Halley’s comet.

This episode airs in the UK on Saturday December 19th 2015. It is the eightth of the second batch of 13 episodes of Season 1’s 26 episodes.

Thunderbirds Are Go 121 “Comet Chasers” – Clip

Thunderbirds Are Go 121 “Comet Chasers” – Gallery

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The main characters for the episode
Episodic pictures

Thunderbirds Are Go 121 “Comet Chasers” – Lowdown


In 2060, Halley’s Comet is again nearing its closest pass to Earth. A thrill-­seeking businessman and his personal assistant fly their exclusive yacht up to chase the comet, and end up sending out a distress call moments later.

Alan and Scott fly up in Thunderbird 3 and find the ship stuck in the tail of the comet, and jury-­rig a tow for the ship. They manage to get the two thrill-­seekers off the yacht before it breaks apart.

Thunderbirds Are Go is a reboot of the classic 1960’s puppet series Thunderbirds using CGI techniques to augment the models.


Cast and Crew
Rasmus Hardiker
Scott and Alan Tracy
Thomas Brodie-Sangster
John Tracy
Sandra Dickinson
Grandma Tracy
Jack Whitehall
Francois Lemaire
Taj Atwal
Madeline Lemaire
Randolph Heard
Gerry & Sylvia Anderson
Original Authors
Rob Hoegee
Head Writer
David Scott
Giles Ridge
Executive Producer