"Sister Of Mercy" is a song by the British pop group Thompson Twins.

[2] The promotional music video for this single was directed by Dieter Trattmann and featured actress Frances Tomelty.

The B-side of the single was a megamix of various Thompson Twins songs titled "Out Of The Gap".

It was inspired by a news article about a person in France having murdered someone, but the court considered the act as a "crime of passion," and that it therefore couldn't be tried on the same basis of a regular homicidal murder.

[3] Written by Tom Bailey, Alannah Currie, and Joe Leeway.