Starring Shane Rimmer, David Graham, Christine Finn, Peter Dyneley, David Holliday
Directed by David Lane
(actor & director credits courtesy IMDB.com)
While Brains works on refinements to his robot, the rest of International Rescue is captivated by a space mission to capture a piece of the sun.
Some interesting outer space effects highlight this episode, with Gordon Tracy and the space-worthy Thunderbird 3 taking center stage, and Tin-Tin Kyrano apparently for the first time takes on an important role in the mission. Per Wikipedia, the Tracy brothers were named after real-life astronauts, so creator Gerry Anderson's interest in the space program likely provided a strong inspiration for this adventure.