The red-hot third season of the show. Though many of the firefighters still grieve over the loss of one of their own in a brutal explosion, they are faced with new challenges: a determined arsonist, the complications of staff romance and tension inside the house with shocking results. Watch the passion and conflicts flare amongst the brave men and women of Firehouse 51 in Season Three, presented back-to-back and uninterrupted for maximum impact.

The team hunts for a boy after he disappears while in his grandmother's care.

When an inventor disappears, the team is confused to discover two ransom notes for different amounts.

Bobby rescues a woman from a vicious attack but his noble action threatens to end his career when the attacker turns out to be a Sudanese diplomat. Buffeted by lies and facing the stonewall of "diplomatic immunity."

Sue and the team are thrust into a pressure packed case when they determine seemingly random shootings in D.C. Sue finds the case becoming all consuming, forcing her to put her personal life – including a fairy tale date with David – on hold.

When Sue's snitch Howie witnesses a murder, Sue and Jack go undercover to investigate a possible mob connection. But Bobby and Myles feel they've got the tougher assignment: babysitting Howie.

In order to learn how to step outside the box and be something more than the fun-loving girl-next-door, Erica is sent back to a time when her narrow-mindedness and cowardly behavior hurt somebody near to her: she returns to a vampire obsessed ex-boyfriend

When Sue, Jack and the team investigate a bomb explosion at a restaurant, they discover the only survivor – and witness – is a twelve-year-old boy (guest star Tyler Garcia Posey from 'Doc'). Meanwhile, Myles tries a new health regimen: vitamin loading.

Sue and the rest of the team investigate the death of a prominent Senator's son during a college fraternity hazing. But what appears to be an open and shut case of alcohol poisoning takes a surprising turn.

At the end of Season Two, Erica walks through a door, her door, ready to face whatever is on the other side. Now everything in Erica's life-her job, her love life, even her therapy with Dr. Tom-starts anew, and gets turned upside down in the process.