Continuity mistake: The alien's torn spacesuit sleeve somehow mends itself, but then is torn again a few shots later. (00:46:00 - 00:47:50)
Visible crew/equipment: While alien reports to home planet, the shadow of the boom mic passes overhead. (00:12:20)
The Control Voice: It is said that if you move a single pebble on the beach, you set up a different pattern, and everything in the world is changed. It can also be said that love can change the future, if it is deep enough, true enough, and selfless enough. It can prevent a war, prohibit a plague, keep the whole world... whole.
The Forms of Things Unknown - S1-E32
Trivia: This is the only Outer Limits episode that lacks both opening and closing narration. It was absent because "Forms" was the unsold pilot for a series called The Unknown. A second version, stripped of all its supernatural elements (Tone was simply a mad scientist, not a real time traveler), also failed to sell.