Lesser follow-up to The Fly (1958) finds the son following in the footsteps of the father against the wiser counsel of Price. Well made and competently directed, but some stiff dialogue tends to undermine things. Frankham and Seymour are enjoyably slimy, though. Seymour's crooked mortician could well be the inspiration for Don Calfa's character in Return of the Living Dead!
Followed by a more interesting sequel, Curse of the Fly (1965)