Elschäfer. del 5.

Logan: Hi, we've come to save you!
GSD: Amazing! Nobody has escaped this place for a hundred years!
Mary: What happened a hundred years ago?

A bunch of GSD:s from the power plant managed to tear off their shackles, and then steal an aeroplane.

By placing a hamster wheel in cock-pit and tying it to the propeller they managed to gain such speed that they escaped the atmosphere... Rumors say they reached an alien planet.