An Australian woman arrives in London to search for her sister, and finds her involved with a heroin-smuggling gang that is under attack from an unknown rival who is methodically assassinating them with a shot to the head.
English
Picked because they share genre and era with Angels of Terror
Kiss Me Monster
1970
The Punishment
1973
Vanishing Point
1971
What the Peeper Saw
1972
Tormentor
The Long Goodbye
