Season four marked the departure of Karen Filippelli as a regular character, although she appeared for a few seconds in the first episode, “Fun Run” and in the sixth episode,…

Aang awakens to find himself aboard a captured Fire Nation ship with a full head of hair and sustaining serious injuries from the previous battle for Ba Sing Se. At…

The fourth season of the American television medical drama Grey’s Anatomy, commenced airing in the United States on September 27, 2007 and concluded on May 22, 2008. The season continues…

Sam and Dean search for a Crocotta that uses the phone and computer as a means to communicate with people. Its goal is to get people to commit suicide and…

Sam and Dean discover a doctor who, back in 1816, became obsessed with finding the secret of eternal life by taking people’s vital organs. Meanwhile, Bobby finds Bela and Dean…

Sam, Dean, and Bobby hunt down Lilith and fight her and her demons in a final effort to save Dean’s life.

FBI Agent Henricksen finally captures Sam and Dean, but is caught in the middle when a horde of demons descends on the small-town jail to eliminate the brothers.

Dean is killed after looking into a case about the disappearance of a man with Sam. The next morning, Sam is shocked to find Dean alive and is hit with…

In a change of pace, Sam and Dean decide to star in a violent, profane reality show named Ghostfacers. The show takes them to the haunted Morton Mansion, and they…

In this Christmas-themed episode, Sam and Dean follow the trail of an “anti-Santa” that abducts its victims by using their chimneys. Dean tries to get Sam to celebrate Christmas like…

The seemingly harmless practices of a group of neighborhood witches goes bad when one of them kills a woman. Ruby offers her assistance… but she has a few secrets of…

Dean interrogates a college student after the death of Dr. Greggs. Bobby, Sam and Dean all discover the truth behind the fatal death when they all get locked in a…

Bela gets in the way yet again as Sam and Dean are investigating multiple victims who drowned even though they were nowhere near water. Sam and Dean make the creepy…

The brothers investigate the death of a man who committed suicide in a church. However, Sam is forced to team up with an unexpected ally when Dean disappears with a…

The brothers capture a female vampire named Lucy who has no idea how she became one, which leads them to Dixon, a male vampire who is a little too giving….

A young girl trapped in a coma by her wicked stepmother sets off a series of murders based on the fairy tales her father reads her. Meanwhile, Sam tries to…

Sam & Dean track down changelings that are pursuing mothers and their children. A boy they protect bears a strange resemblance to Dean, which at first makes Dean uncomfortable because…

The Winchesters are called regarding a robbery of their father’s storage unit, and track down the robbers to find the item stolen is a cursed rabbit’s foot, which provides great…

Seven demons, based on the Seven Deadly Sins, are released into the world and the brothers must combat them with the aid of a married Hunter couple.

Penny wants to throw a surprise party for Leonard, but Sheldon’s indulgence at an electronics store throws her off-track.

Penny’s break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.

Sheldon finds himself booted from the gang’s Physics Bowl team and replaced with Leslie, so he forms his own team, hoping to prove he’s superior.

When delivery of another collectible leads to Penny’s lashing out at Leonard, he decides it’s time to give up his habit, much to his friends’ protestation.

The rest of the gang fall for Sheldon’s twin sister, and Leonard’s plan to win her heart is derailed when Sheldon declares he’ll be the one to decide who can…

Leonard and Sheldon each lie to avoid seeing Penny’s concert, but Sheldon’s is a bit too complicated for his own good.

With his friends knowing how sour he acts when sick—and avoiding him as a result—Sheldon is nursed by Penny, who hasn’t a clue what she’s in for.

With Sheldon rattled over meeting Dennis, a 15-year-old physicist who’s smarter than he, Leonard helps him look for a way to debunk Dennis’s research.

Raj’s parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon.

When they’re invited to present at a physics conference, Sheldon’s reluctance to share the credit leads to a tiff between him and Leonard, and Penny’s intervention only exacerbates the situation.

With Wolowitz AWOL with one of her friends, Penny’s recruited to fill in for him on the guys’ Halo team

Fearing he’s wasting his time on Penny, Leonard ends up making a connection with Leslie.

Sheldon’s getting fired forces him to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk.

Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.

Leonard volunteers to sign for a package in an attempt to make a good impression on Penny, but when he enlists Sheldon for help, his attempt at chivalry goes terribly…

Leonard asks a woman out after he finds out that Penny is seeing someone.

Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins showing them that as much as they know about science, they know little about actual living.

Season 3 of Prison Break premiered on September 18, 2007. Just when they thought they were out, they are pulled back in — for the most dangerous escape ever. Season…