From the "Thunderbirds" website:
" 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. "
Thunderbirds Are Go every Saturday at 8:30am on ITV from January 2020
