Task: Question Generation
Input (English): Context : Captain Scarlet would also prove to be a progression from Thunderbirds Are Go in terms of its depiction of extraterrestrial life on Mars, although the Mysteron antagonists of this series would be more ambitious than the Rock Snakes of the film by actively seeking to attack Earth. 
Subject : Thunderbirds Are Go 
Relation : director
Output (English): Who was the director for Thunderbirds Are Go?