This is the most assured and hilarious of the three Martin-Carl Reiner collaborations.

The Man with Two Brains, which never ceases to amuse, is at its best when most outrageous.

Pure escapist madness. And a helluvalota fun.

Far from avoiding the tackier implications of this concept, the film revels in them like a puppy in clover; Martin's delivery of the line, "Into the mud, slime queen!" is alone nearly worth the price of admission.

The Man with Two Brains is a fitfully amusing return by Steve Martin to the broad brand of lunacy that made his first feature, "The Jerk" [1979], so successful.

This is Mr. Martin's movie, and he brings to it the ingeniously dopey presence that's become his trademark; he easily carries even the most dubious moments in the rather jumbled screenplay, which was written by Mr. Martin, Mr. Reiner and George Gipe. [03 Jun 1983]

I guess it's a tribute to The Man With Two Brains that I found myself laughing a fair amount of the time, despite my feelings about Martin.

The Man with Two Brains has moments, but they aren't inspired. [04 Jun 1983]