When the guys save a landlord with a nut allergy, Johnny finds the perfect apartment to share with Theresa, and his relationship with her enters a new territory. Meanwhile, Brian tries to understand the terms of his platonic love affair with Voodoo, Billy starts dating Theresa's sister, and Hank has to wonder if he's looking for love in the right places.

Johnny deals with an overly grateful patient; and Brain agrees to take an injured young woman to her prom.

The guys explore ideas of fate and serendipity after several random but fortuitous events, and Johnny gets bent out of shape when he discovers that Theresa doesn't think it was destiny that they met.

Johnny, Hank, and Brian treat an injured gym rat and earn free passes to a sexy health club; Voodoo challenges Brian's new self identification.

On Brian's first night shift, the guys run into some trouble while sorting out a dramatic slumber party.

Johnny has to deal with his prejudice against rich white guys when Hank starts dating Johnny's wealthy landlord. Meanwhile, Billy helps Brian work through his heartbreak after Voodoo starts seeing a guy she met on an asexual message board.

The guys confront chaos when a car crash at a firehouse releases an unusual passenger. Meanwhile, Billy deals with a different sort of chaos when he accompanies Theresa and Maeve to a sample sale.

After they save a local mobster (the Soprano's Steve Schirripa), Brian tries to get the guys to makes some changes in the rig, Hank considers the worst person he's ever helped, and Billy goes looking for his old neighborhood pony.

A drunken brawl between Cubs and Sox fans reverberates at a family barbecue where petty disputes play out over a new gas grill and a big punch bowl full of Hurricanes.

Things get mixed up when Johnny, Theresa, Billy, and Maeve start playing tennis together, Cash helps Hank shop for his mom's birthday, and Brian subs for Cash and rides along with Voodoo and Stats.

When Johnny's dad goes into a coma, Johnny's mom deals with her grief by placing bets on the time of her ex-husband's death and Johnny handles his own grief by trying to pay off an old debt. Meanwhile the guys can't get an unfortunate song out of their heads.

After Johnny sees how much respect Theresa gets on the job, he gets the guys to revive an old program in order to get a little respect for EMTs.

After the guys treat a man with a deep fear of hospitals, Brian confronts his own fear of moving out. Meanwhile, Johnny has a fear realized when Billy temporarily moves in with him and Theresa.