I had not watched since the first episode, but caught a rerun of the one with Atlantis. I was curious to see why Atlantis would need these guys. It was for a cracked overflow on one of their tanks. Turns out at ATM was no scheduled to work on the tank, they were originally only there as spectators and to do the shark dive, but Joe ran into them, said the overflow was leaking and his repair guy was out sick and they fixed it for him since they originally built the tank.