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Sheridan Smith and Gemma Chan Join Thunderbirds Are Go Cast

11th December 2019

Sheridan Smith OBE and Gemma Chan will voice characters in the final episodes of Season 3, as well as Peter Davison, Tanya Moodie, Cel Spellman and Sacha Dhawan.

Sheridan Smith is Scraps, a fearless urban explorer and junk collector who scavenges for valuable treasure in deep underground trash mines. Gemma Chan lends her voice to Professor Kwark, an aeronaut who has designed the latest high-speed jet attempting to break the world air speed record.

Peter Davison voices Higgins, a long-time employee of Brains’ close friend Professor Moffatt, who is one in a number of suspects to have potentially stolen a precious fuel required by International Rescue, and Sacha Dhawan voices Stew, a sailor out on his first sea voyage whose tanker’s engines break as a tsunami heads directly for it.

Tanya Moodie is Chief Carter, a fire chief who needs assistance from International Rescue in tackling an outbreak of fires, while Cel Spellman is The Announcer, who lends his enthusiastic commentary to an incredible attempt by aeronaut Professor Kwark to break the world air speed record.

All join series regulars Thomas Brodie-Sangster, Rasmus Hardiker, and David Menkin, who play the Tracy brothers, as well as Angel Coulby as Kayo Kyrano, Kayvan Novak as Brains, Sandra Dickinson as Grandma Tracy, Rosamund Pike as Lady Penelope, and David Graham, now entering his sixth decade as the voice of the ever-faithful Parker.

Find out more about the new episodes here, and don't miss brand-new Thunderbirds Are Go every Saturday at 8:30am on ITV from January 2020.