Dr. Murchison (Leo G. Carroll)’s Timeline and Summary

Murchison, the head of Green Manors, has a nervous breakdown. The Board decides to replace him with Dr. Edwardes.
The unstable Dr. Murchison becomes even more unstable. He goes and has an argument with Edwardes.
Then he stalks him while he's skiing and shoots him.
But then, to what must be Murchison's great surprise, a guy shows up at Green Manors claiming to be Edwardes.
"Edwardes" is really John Ballantyne, a patient of Edwardes' who saw the shooting, but (luckily for Murchison) got amnesia and thought he was Edwardes.
Ballantyne's discovered as an impostor and is blamed for the murder. Police pursue him.
All seems to be going swimmingly for Murchison.
Unfortunately, Constance Petersen, a doctor at Green Manors, falls in love with Ballantyne and eventually cures him.
Ballantyne still ends up going to jail, though. Phew.
But, oops, Murchison lets slip to Constance that he knew Edwardes at one time, which means he was faking when he pretended to be taken in by the impostor.
Constance confronts Murchison. He threatens to shoot her.
But then he ends up letting her go and committing suicide instead.
That's it for Dr. Murchison.