Continuity mistake: In the lab, the alien's arms change positions instantaneously between shots. (00:13:50)
The Outer Limits (1963)
1 mistake in The Bellero Shield - chronological order
Dr. Paul Wayne: So what difference does it make, whether it's 20 minutes or 20 years, since neither amounts to the faintest echo of the tiniest whisper in the thunder of time.
The Forms of Things Unknown - S1-E32
Trivia: Part of Dominic Frontiere's haunting musical score for this episode later became the theme and background music for the TV series The Invaders, a show for which Frontiere served as the primary composer.