While Brian has his first day on the rig, Johnny runs into Theresa for the first time since they took "a break," and Hank and the guys discuss their "In Case of Emergency" contacts.

A lightning strike at a church picnic gets the guys to start thinking about how there’s no justice in sickness and injury, because like it or not, the “rain falls equally on the just and the unjust.” After a discussion of karma, the guys volunteer to teach CPR to disadvantaged kids only to later be given killer Bears tickets for the same day they’re supposed to teach.

A dying man’s last words inspire Johnny to have the first conversation he’s had with his dad in seven years. Elsewhere, a determined Brian takes Hank on a quest to communicate the dead man’s final message to a long lost love.

After observing the respect that Theresa receives on the job, Johnny gets the guys to revive an old program in order to get a little respect for EMTs.

After a drunken hook up, Johnny and Theresa decide they can have "just sex" so long as they establish clear ground rules. Meanwhile, the guys treat injuries resulting from a drunken backyard game of illegal "Jarts", one of which allows Brian to start checking items off his EMT “bucket list.”

While teaching a class to prospective EMTs, the crew recalls a day that ran the gamut from the mundane to the catastrophic, and Johnny tries to find out who ate last the donut.

After saving a local mobster, Brian encourages the guys to make changes in the rig. Hank considers the worst person he has ever helped. Billy looks for a neighborhood pony.

Johnny and his mom deal with his dad's slipping into a coma in very different ways: He tries to repay an old debt while she places bets on what time her former husband will die. In other events, the guys can't rid themselves of an unfortunate earworm.

After it's revealed that Hank is deathly afraid of spiders and Brian comes face-to-face with his suicidal doppleganger, everyone examines their own fears, and Johnny gets payback for all the practical jokes he’s played.

A drunken brawl among sports fans reverberates at a family barbecue, where disputes occur over a new gas grill.

The guys consider ideas of fate and serendipity when random events occur; Johnny is upset to learn that Theresa does not believe destiny had a hand in their being together.

The guys treat an overly-ambitious gym rat; Johnny and Hank get free passes at a health club; Voodoo tests Brian's limits.

A car crash at a firehouse releases an unusual passenger; and Billy accompanies Theresa and Maeve to a sample sale.

Johnny, Theresa, Billy and Maeve begin to play tennis together; Cash helps Hank shop for his mother's birthday gift; Brian rides along with Voodoo and Stats.

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." Brian tries to understand his relationship with Voodoo.

Johnny must deal with his prejudice against rich, white men when Hank begins dating his landlord; Billy helps Brian work through heartbreak.

In the Season 2 finale, the guys treat a man who fears hospitals. In other events, Brian confronts his fear of moving out; and Johnny has a fear realized when Billy temporarily moves in with him and Theresa.

A patient knocking on death's door pleads with the guys to go back to his house and clear the search history on his computer. After they stumble across a troubling image on the computer screen, the guys can’t get it out of their heads. Meanwhile, Johnny remembers that Theresa has his iPad and it contains things that he wishes he could clear.

Johnny steps up for his friend when Hank gets an invitation to his Ex’s wedding, while Theresa has trouble seeing eye to eye with a wedding guest. Meanwhile, Brian learns a new job skill.

Johnny and Hank are horrified when they find out they have to ride along on Brian's first night shift.

Johnny introduces Theresa to his father and is taken aback when his Dad drops a bomb of a secret on him. Elsewhere, Brian struggles to find the right moves to put on his work crush, while Hank gets a new father figure that he never planned for.

The murky relationship between the caregiver and the cared-for is exposed when Johnny encounters an overly grateful patient and Brian agrees to escort an injured young woman to her prom.

Theresa has a brush with death on the job and resolves to join the FBI in Washington. When Johnny proposes marriage to keep her in Chicago, they must overcome a series of catastrophes and mishaps to get to the altar.