Twelve Monkeys ending explained

What happens

Cole is shot dead at the airport trying to stop the virus's release, while a small boy watches. A scientist from the future calmly boards a plane beside the infected assistant, and the plague goes ahead.

The last image

The scientist sits on the plane beside the man carrying the virus, while Cole's death plays out below.

Two readings

1 · Fixed, unchangeable fateCole's death is the same scene he dreamed, so the past was always going to happen.

2 · A tragic ironyHis efforts to prevent the plague only help bring it about.

What it says

The ending shows a world where nobody listens and the past cannot be changed. Cole's warning was real, and Railly understands it too late. The loop leaves you with tragedy, not escape.