Airlock

For the Doctor Who episode entitled "Air Lock", see Galaxy 4.

An airlock is a device which permits the passage of objects, people, and the like, between two drastically different environments, such as between a pressurized and vacuum environment or between an underwater and dry environment. The lock consists of two airtight doors in series which do not open simultaneously, allowing the intermediate chamber to change from one environment to the other.

References

• The Drahvin leader Maaga tried to kill Steven Taylor by leaving him in a de-pressurised airlock. (DW: Galaxy 4)
• To prevent Kirksen from blackmailing the Doctor into returning the ship to Kembel, and the Daleks, Katarina sacrificed herself by opening the airlock door on Mavic Chen's spaceship, 'Spar', expelling both herself and Kirksen into the vacuum of space and killing them both almost instantly. (DW: The Daleks' Master Plan)