Invisible lift

The Invisible lift was the transportation between Torchwood Three and the Roald Dahl Plass above. Torchwood personnel could enter or leave without arousing suspicion, since the exit benefited from the effects of the perception filter of The Doctor's TARDIS that once stood above it.

Features
The invisible lift takes the appearance of a slab of concrete next to the water tower. When someone stepped on it, they would unnoticed by everyone around them. It could be remotely activated by Jack's Vortex manipulator. (TW: Everything Changes)

History
While showing off Torchwood, Jack took the invisible lift with Gwen. He used it again to stop Suzie Costello from killing Gwen, but the perception filter failed to work on her, allowing her to kill Jack. (TW: Everything Changes)

When Lisa Hallet had been activated, the team used the lift to escape, allowing Myfanwy to fight Lisa. (TW: Cyberwoman)

Jack used the lift to get to the hub with John Hart. (TW: Kiss Kiss, Bang Bang)

Gwen wanted to show Torchwood to Rhys by using the lift. (TW: Meat)

When Agent Johnson planted a bomb inside Jack, Ianto and Gwen used the lift to escape. The Lift was later destroyed along with the Torchwood Hub. (TW: Children of Earth: Day One)