Towards the start of Season 2, fans noticed that Bishop was conspicuously absent — and his character was said to be on an operation overseas.
Having a character, especially a main character, leave so abruptly is always hard, but then it was revealed that Bishop isn't just missing — he's actually dead.
Bishop's character was killed in a plane crash by the man he was trying to investigate, Mason Quinn. In the past, Bishop was responsible for ensuring Quinn served a life sentence.
However, Quinn was released and became trouble again. Bishop was working to find him, but Quinn found Bishop first and shot him down with a Russian electromagnetic cannon.