|Story Code: 6N / Season 21||UK Airdate: 26 Jan to 3 Feb 1984||Doctor: Peter Davison|
|First airings by location||UK Repeats / Foreign Cable and Satellite||Previous Story / Next Story|
This story aired in the following known countries. They are listed in chronological order according to known airdate. If no month is noted, the actual airdate is not confirmed, and is a close approximate. (Refer also to Selling Doctor Who for expanded airdates.)
|United States||from Nov 84||NTSC|
|United Arab Emirates||Dec 87||PAL|
|New Zealand||Jun 89||PAL|
- Lionheart did not supply the title of this episode to TV Guide or newspapers. It was regularly listed as An outpost of humans comes under attack by an ancient foe in place of the episode title.