Release Message:  The Doctor and the TARDIS return Tegan (Janet Fielding) to Heathrow Airport about 300 years early: tall trees, peaceful, clear skies, thriving vegetation -- and a touch of sulfur in the air.

Description:  The TARDIS returns Tegan to Heathrow Airport: Tall trees, peaceful, clear skies, thriving vegetation and a touch of sulfur in the air. Obviously the TARDIS is a little out of date (about three hundred years or so), but upon looking around the Doctor finds there's more amiss than his navigational controls, all arising after a recent comet crash that was not on Earth's schedule.