Tethered Aerial Release Developed In Style

The Tethered Aerial Release Developed In Style (abbreviated TARDIS), unlike its namesake, was a hot-air balloon owned by Jackson Lake while he was under the impression he was the Doctor. As the Tenth Doctor noted, its creation was nothing short of sheer brilliance that Jackson Lake already possesed.

When piloted by the Tenth Doctor, Lake's "TARDIS" was key in the destruction of the CyberKing. (TV: The Next Doctor)