An invisible two-headed Martian enters a bar...
Sounds like the start of a joke, and perhaps it is, Rod Serling having a laugh for a change instead of delivering a thought provoking morality play or bothering to come up with one of the show's trademark ingenious twist endings. It's pure inconsequential whimsy, designed to amuse those looking for twenty-five minutes of light-hearted escapism. I liked it.
Burgess Meredith plays meek vacuum cleaner salesman Luther Dingle, who unknowingly becomes the subject of a scientific experiment by the Martian: he is transformed from cowardly human punchbag into a real-life Hercules when the alien makes him three hundred times stronger. Rather than employ his newfound powers wisely, Dingle uses them to become a media sensation, the experiment ultimately deemed a failure by the Martians, who remove the man's powers as he demonstrates his strength to a TV reporter.
No longer in the limelight, and back to being a wimp, Dingle is once more subject to abuse from brash bar bully Bettor (Don Rickles); however, a pair of passing invisible Venusians choose Luther for their own experiment and increase the man's intelligence five hundred-fold.
Not one of the greatest episodes that the show has to offer, but very entertaining nonetheless. Worth watching just for the hilarious aliens. 7/10.