Thunderbirds Are Go - Parker ©2015 ITV Studois/ Pukeko Pictures

In Thunderbirds Are Go 125 Scott, Kayo, and Lady Penelope must save Parker when a sting operation by the Global Defence Force (GDF) ends with a cybertech thief on the run.

This episode airs in the UK on Saturday January 16th 2015. After this there is just one more episode left unshown of the second batch of 13 episodes of Season 1’s 26 episodes.

Thunderbirds Are Go 125 “Undercover” – Clip

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Thunderbirds Are Go 125 “Undercover” – Gallery

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The main characters for the episode
Episodic pictures

Thunderbirds Are Go 125 “Undercover” – Full Lowdown


When an undercover sting operation to secure some stolen tech involving Lady Penelope, Kayo, and a heavily disguised Parker gets blown prematurely by the Global Defence Force (GDF), Parker finds himself taken prisoner by the panicked thief Banino.

The thief takes off in a stolen GDF flyer with Kayo in hot pursuit with Thunderbird Shadow.

A thrilling aerial pursuit ends with a hard landing into a factory that requires International Rescue to intervene. Scott helps rescue a factory worker in Thunderbird 1, Lady P. rescues Parker, and Kayo goes after the thief.

But when Banino reveals he knows the shocking connection between her and The Hood, Kayo finds herself torn between letting him go or giving up her secret.

Either way, Kayo must face the fact that in terms of keeping her secret from her brothers, her days are numbered.


Cast and Crew
Rasmus Hardiker
Scott Tracy
Massimo Marinoni
Angel Coulby
Rosamund Pike
Lady Penelope
David Graham
Adjoa Andoh
Colonel Casey
Kayvan Novak
Ned Tedford & GDF Commander
Benjamin Townsend
Gerry & Sylvia Anderson
Original Authors
Rob Hoegee
Head Writer
Tim Gaul
David Scott
Series Director
Giles Ridge
Executive Producer