Star-studded guest cast line up announced for the new episodes of Thunderbirds Are Go

The series returns in May with all-new episodes featuring a whole host of guest voice actors. Jennifer Saunders voices Helen Shelby, a no-nonsense biologist who designed the stunning Supreme Barrier Reef. Alan Ford returns as cockney Light-Fingered Fred, joined by Larry Lamb as Gomez - two 'friends' from Parker's criminal past who want to use FAB1 as a getaway car in their criminal exploits. Sylvester McCoy stars as Aezethril the Wizard, a whacky and dramatic inventor.