Classic TV - One Step Beyond - "Ordeal On Locust Street" (1959)

A seemingly normal family is hiding a terrible secret: their son has the features of a deformed, fish-like monster. A somewhat mysterious hypnotist with strange powers claims that he can help them, and in their desperation they enlist his aid.
https://www.imdb.com/title/tt0507799/plotsummary?ref_=tt_ov_pl

This video is in the Public Domain.