I had poor luck with a “pass the line” concept. Here’s hoping this has a better chance.
In some movie one actor kills another actor’s character. In another movie the victim actor kills somebody else’s character.
Let’s see how far this chain can be taken before we get to some actor who has never killed anybody!
First killing: Tom Selleck kills Alan Rickman in Quigley Down Under (1990)
Where does Alan Rickman kill somebody else?