This is another marvelous episode which showed the true talent of the "Bewitched" cast in the serious venue of the Twilight Zone.
One indicator of a performer's skill is what they can say to the viewer without dialog, in expressions and movements. Agnes Moorehead's expressions of drudgery and loneliness turned to fear and terror were pulled off wonderfully.
An aside to those focusing on the cheesy special effects and the obvious department store toys used for the spacemen; Shoestring budgets using cheap and cheesy effects even for their time can be and are overcome by excellent writing, direction, and acting. The TZ movie and subsequent remake series of the 80s and 2000s had much bigger budgets and state of the art special effects, but didn't have the flair for storytelling that Serling, Matheson, and Beaumont did. Remember that The Honeymooners made memorable shows out of a set of a bare room, a table, and a window.
One indicator of a performer's skill is what they can say to the viewer without dialog, in expressions and movements. Agnes Moorehead's expressions of drudgery and loneliness turned to fear and terror were pulled off wonderfully.
An aside to those focusing on the cheesy special effects and the obvious department store toys used for the spacemen; Shoestring budgets using cheap and cheesy effects even for their time can be and are overcome by excellent writing, direction, and acting. The TZ movie and subsequent remake series of the 80s and 2000s had much bigger budgets and state of the art special effects, but didn't have the flair for storytelling that Serling, Matheson, and Beaumont did. Remember that The Honeymooners made memorable shows out of a set of a bare room, a table, and a window.