Summary: when a seemingly cut-and-dried incident calls out Torchwood early one morning all is not as it originally seems. Alien technology leads the team into a trap of danger and curiosity, propelling them to an unfamiliar place with unfamiliar faces. Split into two, the team must find a way back before past events puts one member of Torchwood into danger.
Spoilers: season1 up to episode 7.
part 4 here