The method used to make Thunderbirds has been dubbed Supermarionation and involves the use of advanced puppets with an articulated lower lip that could automatically follow pre-recorded dialogue.

The unique method was used for a set of projects that were filmed by AP Films (now known as Century 21 Films) including Four Feather Falls, Supercar, Fireball XL5, Stingray, Captain Scarlet and the Mysterons, Joe 90, and The Secret Service. While Supermarionation dwindled after the 60s, Thunderbirds continued to have a strong cult following, largely due to the unique puppetry and special effects employed in the making of the series.