Mike invites girls back to the house, but The Situation quickly gets out of control ... in more ways than one.

Snooki gets into her second fight of the summer. As the Grenade is back with reinforcements: The Hippo.

The Hippo charges Snooki and it gets ugly.

Vinny does not get fired for hooking up with the boss' girl. He does, however, take a liking to Mike's sister!

His family also rolls down to the shore and his mother cooks a giant Italian feast for the housemates. Nuts.

Ronnie gets into a brawl of his own, after getting into an emotional brawl with Sammi throughout the night.

She's left questioning their relationship.