Good idea, I will start. Maybe he was paid to stop progress on clean energy fusion as it is a risk to the oil or existing nuclear industry and if he self deleted his family would be compensated. Your turn. Bonus if you can make it sound a bit daft / nutty.

I’ll follow X-Files so M. Whoever came back from a dystopian future to kill his colleague whose work enables that future.

I forgot which episode it is, but it is almost the same idea, and the same school BTW.