The Twilight Zone DVD contains Serling's Ithaca lecture on this episode and he's deeply critical of it. Everything he says is correct.
I'm curious, what exactly is he critical of?
"Escape Clause" (1x06)
Synopsis: Egocentric hypochondriac Walter Bedeker is visited by the devil, who proposes a deal: In exchange for his soul he can become immortal.
Review: What in the synopsis sounds like the ingredients of a
Twilight Zone classic, becomes a disappointment in "Escape Clause". Apart from a rather questionable mischaracterization of hypochondria, which makes it look like everyone suffering from this disorder is merely an odd fellow (plus, I doubt that immortality would be the cure-all for most hypochondriacs), there's the issue of the constantly changing tone of the episode, which I found very irritating: While at first everything it played like an all-out comedy, the later part suddenly becomes a deadly serious drama. The episode doesn't seem to be sure what exactly it wants to be. But all of that wouldn't be a problem, if it would remain entertaining. Sadly, it doesn't.
The sole bright spot are the performances by David Wayne as the egocentric hypochondriac and especially Thomas Gomez as a wonderfully devious devil. But for the most part "Escape Clause" (much like "The Sixteen-Millimeter Shrine" before it) suffers because of the fact that the solution to the story can be foreseen halfway through the episode.