Great sites
Trivia
The bird-beaked alien megasoid from this episode made a "guest appearance" in the first Star Trek pilot, shot the same year (1964). It can be glimpsed in one of the Keeper's enclosures in the uncut version of "The Cage." See more...
Plot hole: Andro has memorized "every detail" of Cabot Jr.'s life, including his mother's name, Noel. Yet when he travels to the past, meets Noel and learns her name, he still mistakes Cabot Sr. for Cabot Jr., who isn't born yet. Having memorized all those details, he would have known the moment he met her that Noel was Jr.'s mother. Andro's confusion makes no sense.
Revealing: When the alien posing as a human is exposed, the OBIT screen shows his "true" alien form while he continues to appear human to the naked eye. The actor in alien costume on the screen copies Jeff Corey's movements, but at one point rather badly shatters the illusion by forgetting to raise his arms when Corey does.
Factual error: When the energy monster kills his entire research staff by stopping their hearts, Dr. Block brings them all back to life (with their minds and personalities intact) by installing pacemakers. But when the heart stops functioning, brain death occurs within minutes. For this to work, he'd not only have to operate on several people simultaneously, he'd also have to be the fastest heart surgeon on Earth.
Continuity: Harvey peeks into the small hole in the box using his right eye. On the first view from inside the box, a right eye is indeed looking in. But when the monster appears, a left eye is peering through the hole. The shot cuts immediately back to Harvey, who still has his right eye pressed to the opening.






