In the following season's offering Cheap Is Cheap (1959), a hit man describes having seen this TV program, and thinks it was a good way to bump someone off.
This is one of the rare episodes where Alfred Hitchcock does not begin by saying his distinctive, "Good Evening."
This episode was scripted by Roald Dahl and the plot, and pretty much the whole script, was repeated 21 years later (almost to the day!), in his TV series Tales of the Unexpected (1979) (S01 E04, under the same title, Lamb to the Slaughter (1979)).
This is one of the rare instances where, at the end, Hitchcock does not discuss the fate of the perpetrator of the crime.