Thunderbirds Are Go S01E23 - Chain of Command

During a joint operation between International Rescue and the Global Defence Force, a series of mishaps nearly ends in disaster. In the wake of the botched mission, Colonel Martin Janus takes over the GDF, imposing a strict set of restrictions on International Rescue. As Lady Penelope and Parker attempt to reason with the colonel, they begin to realise that he is not quite what he seems - then it becomes apparent that he really is an imposter working for the Hood.