TARDIS

A TARDIS is a time machine originally from Doctor Who. Its name is an acronym for "Time And Relative Dimension(s) In Space." It is a multidimensional vehicle whose interior can be customized. Its exterior changes depending on the time and place it is in, so it may blend in with its surroundings. Sometimes the device that facilitates this change breaks and the TARDIS will remain looking the same way until the problem is fixed.

When the macrovirus epidemic swept through HQ, each pair or trio of uninfected Agents was given a TARDIS to serve as a mobile Response Center (which has been cited as a key component of Cycle Theory). They are coordinated by the Corkscrew Cattail. Prior to this point, the only TARDIS known to be in HQ belonged to Agent Morgan, who was reportedly quite annoyed by this development. And by being killed. Again.

In some parts of the Multiverse sentient TARDISes are known to exist. None have appeared in HQ yet, but it is probably only a matter of time!