Heist Society is an episode of Thomas' Adventures of Thunderbirds Are Go ( 2015 TV Series).
On an underwater hyper loop train, Lady Penelope and Parker are escorting Professor Moffat to a rendezvouses with the Global Defence Force in Iceland in order to safely deliver a particle born from the Supreme Hadron Collider disaster - Centurium 21. However, the Hood is keen to get his hands on the particle and plots an elaborate robbery in order to steal it for himself. Thunderbirds 1, 2, and 4, followed by Thomas, Mike, Bert and Rex, are soon dispatched to not only rescue the trapped train and its passengers, but also attempt to foil the Hood's plan. During all this, the four small engines prove that little engines can do big things.
- Never Overlook A Little Engine [heard in the credits]