Franklin's Kite. There are two parts to this myth. The first is to test the actual circumstances surrounding Benjamin Franklin's discovery of electricity (that is, can you fly a kite in a storm, and if you can, will it conduct a current down a string to a key and can the person flying the kite get shocked). The second is to see if that person (Benjamin Franklin) survive the event.
Chick Sexer. Visiting the McMurray Hatchery, Mike learns that there are two ways to tell chickens apart. By their feathers and (appropriately) by their poo. Well, not so much by their poo, but you have to get their poo out of them. Once you do, the male chicks (usually) have a little bump. And the female chicks (usually) do not. The really good chick sexers can handle 20 thousand chicks in a shift. Pretty good because they go through 80 thousand chicks in a week. Wow. That's a lot of poo.
In this penultimate episode of the series, Trooper Franklin goes to check on reclusive Charlotte Scott, and he suspects she's just a snob. Then he finds out she is just scared, and so naturally he becomes protective - until he gets a bit of the same fear himself.
First they just see the lights, and then they hear things on the roof. Then he sees the giant fingerprints on his patrol car, and the next morning they see the huge alien itself! As he shoots it, they are suddenly in the midst of a bunch of wind - it was just a balloon.
Then they see the true aliens - a small spacecraft (that looks suspiciously like the one used in The Invaders way back in Season 2), and they are just a tiny race that was trying to frighten the people of Earth with trickery, and when they can't, they take off again. That was a close one!
Wallace V. Whipple has found the answer for his company's flagging fortunes, and it is to replace some 60 thousand people with machines. Once he's done that he starts to replace everyone with machines. Pretty soon, he's all alone in the factory, and then the board decides to replace him (with a robot that looks suspiciously like the one from Uncle Simon earlier in Season 5). Whoops.