 The launch of the Sun Probe at the start of the episode "The Perils  of Penelope" is the same event that was seen in flashback at the  start of the episode "Sun Probe". The events of that episode take  place one week after the launch, so this episode takes place  immediately before. Indeed, "The Perils of Penelope" and "Sun Probe"  can be viewed as Thunderbirds only two