overdone or not, Im with CF ^^ Time travel seldom disappoints. If you can keep all the time travel within days..
chronology like this..
today the sciguy is on the verge of announcing his discovery, hes been sleeping at the lab for few days making this break through..
He goes home, finds wife murdered
drives back to the lab calls the police while driving to the lab
goes back to yesterday to "prevent" the murder
something goes wrong, he fails to save her and unwittingly leaves physical evidence pointing to him BEING at the scene of the crime at the time of the murder
he comes back to the present, drives home and finds the police on the scene
thats what he thinks anyway...
Here is what really happened..
Hes been sleeping at the lab becuase he found out that she is having an affair..
He goes home and kills her
has remorse and guilt
goes back in time to prevent the murder
As hes explaining to his wife..
the old self sneaks up on him and knocks out the future self, the old self then kills the wife.
the old self drags the future self back to the present (his future)
levees him sitting on the lab floor dazed
the future self drives home, gets arrested for murder..
The old self is alive living free
but wait theirs more..
the old self, is now in the present, goes back in time, before the murder, and the murder redux, brings the living OLD wife to the PRESET, together they get the insurance money, steel the time machine design, and live happily ever after. (shed been having an affair with the future version of her husband all along, together they planed the whole thing.. )
lol