The 7th is Made Up of Phantoms - S5-E10
Factual error: Numerous references are made regarding George Custer being a general at the Battle of the Little Bighorn when, in fact, he was a lieutenant colonel.
Probe 7 - Over and Out - S5-E9
Factual error: Cook draws his sun and planets in the sand, saying that it's "my galaxy." When Norda draws hers, he calls it another galaxy. Wrong. He's drawn a solar system, not a galaxy. (A galaxy is a collection of millions of solar systems.) The terms are in no way synonymous - there's a vast difference, and a trained astronaut would definitely know that. Their little ships can't possibly cross galactic voids (that would require tens of thousands of years, even at many times the speed of light), so Cook and Norda's planets are in different star systems in the same galaxy - this one. (00:16:30)
Factual error: When McNulty clicks his stopwatch the helicopter is shown frozen in flight but the blades are shown as a blur, they should be just as much in focus as the rest of the helicopter.
Answer: It's explained in the episode. The aliens are experimenting to see how humans react to various scenarios. This just happens to involve them using super strength.
Thanks. It's been a long time since I saw the episode so I forgot.