He thought it would be an ordinary trip to the supermarket. But for geniuses like Brains, things are hardly ever ordinary. Set sometime during Thunderbird Six. Free virtual cookies if you can figure out which bit.

Two cries for help, two underwater rescues - and Gordon finds he's not the only thing this deep in the water...

One of these days, the inhabitants of Tracy Island are going to learn there's No Such Thing as an event free holiday where International Rescue are concerned.