How can special effects and puppetry secrets last employed in the 1960s be revived for use in the 21st century? That was the challenge posed to the team of filmmakers behind 'Thunderbirds: The Anniversary Episodes'! In this behind the scenes documentary, the crew reveal the tips of the trade that needed to be employed in order to create three brand new episodes of Thunderbirds for the series 50th anniversary – this making of covers "Introducing Thunderbirds", "The Abominable Snowman" and "The Stately Homes Robberies" with contributions from original series director David Elliott, Lady Penelope sculptor and puppeteer Mary Turner, actor and fan Sanjeev Bhaskar, producer Stephen La Rivière and many more.