Apollo followed the two other guys since he had nowhere else to go. While following the two guys he just realized he had no idea what the Hexes that ran from the prison looked like, so he pretty much was out of luck of getting his revenge. He then thought that maybe these other hex can bring him to the ones that ran away.

The scientist in the white coat came running to the head guard. "this is terrible he got away, we need to find him, if we don't the rebels may be able to turn him to their side." The head guard said "don't worry about him, he will return to us eventually, he was a loyal dog"