Stowaway


 * For the short story, see Stowaway (short story). For the song, see "The Stowaway"

A stowaway was an uninvited guest onboard a vessel. The Tenth Doctor became a stowaway onboard the Titanic after the TARDIS collided with it. As the Doctor wasn't officially present, the Heavenly Host's programming couldn't kill him. (DW: Voyage of the Damned)