When Calvin and Elizabeth are sitting beside each other in the Hastings cafeteria discussing Occam's Razor and RNA world theory, they each have their faces resting on an arm with their elbows on the table mirroring each other. When Dr. Price comes over to tell Elizabeth that he'll be needing one of her special cups of joe and they cut back to Elizabeth saying "Right," her arm is already down on the table crossed in front of her other arm.
When Calvin is telling Fran Frask all of the things he wants done because of Elizabeth's break-in to his lab, the number of fingers he holds up doesn't match the number he's verbally listing to Fran. He has one finger held up when he says "Two" (15:23) and two fingers held up when he says "Three" (15:29).
Calvin mentions RNA World Theory. Although the concept was introduced in 1962, the term did not exist until 1986.
The episode shows a family protesting the I-10 freeway. However, the episode takes place in 1951 and the Interstate highway system only started in 1956.
Evans arrives at the party and is told by a colleague It's like seeing Halley's comet, but pronounces it Hailey. The colleague, a man of science, would have pronounced it properly: Halley.