I think the Prescription Murder ending might have been well acted, but made less sense, why would he kill his wife and risk jail or death penalty for someone he didn't really care about? The Enough Rope ending fitted the story better, I think anyway.
There were 3 copies on youtube, I don't know how quickly they get taken down, I hope they are there now if anyone wants to see it.

He married an older woman who had money.
Killing her was his way of being free and rich.
Like Richard Kiley in " A friend in Deed".
He used the girl, he didn't love her.
His confession didn't work imho.
The play has a different emphasis ( i own a copy).
It's more about the psychiatrist who truly does love the girl .
Gene Barry played him as a cold, calculating killer.
I'm curious to see the tv version.
Thanks for the info!

I just watched ENOUGH ROPE which has a completely different ending from the stage play and PRESCRIPTION MURDER even though it is credited to Levinson and Link!
Is there ANOTHER tv play with the phony suicide/ confession ending?

Btw Bert Freed was totally wrong for COLUMBO ( although, like Falk he wears a bad toupee!😉).
It makes you really appreciate the genius of Falks interpretation!