Thunderbird 6 is a 1968 British science-fiction adventure film written by Gerry and Sylvia Anderson, directed by David Lane and produced by Century 21 Cinema. A sequel to 1966's Thunderbirds Are Go, it was the second film to be adapted from the 1960s television series Thunderbirds, which combined scale models and special effects with marionette puppet characters in a filming process that the Andersons termed "Supermarionation".