Mayhem on a Cross

1Yanks in the U.K. (1)

44 minSep 3, 2008★ 8.0

Season four begins all the way in England, with Booth speaking at Scotland Yard and Brennan guest-lecturing at the prestigious Oxford University. Knowing of Booth and Brennan's expertise in their respective fields, local officials ask for their help with a high-profile murder investigation that involves a British heiress.

2Yanks in the U.K. (2)

43 minSep 3, 2008★ 8.2

With the case of the murdered heiress solved, Booth and Brennan prepare to head back home, but are shocked to learn of another murder - and this time it's someone they know. Meanwhile, with Birimbau unexpectedly coming back into Angela's life, things get complicated between her and Hodgins.

3The Man in the Outhouse

44 minSep 10, 2008★ 7.7

The body of the host of a popular reality TV show is found partially decomposed in an outhouse, and Booth and Brennan must find out who the killer is. Meanwhile, Booth learns that Brennan is juggling two relationships.

4The Finger in the Nest

43 minSep 17, 2008★ 7.8

Parker, Booth's son, discovers a corpse's finger in a bird's nest, causing the team to launch an investigation to try to find the rest of the body. After finding the corpse, the team discovers that the death was caused by a dog, leading them to an illegal dog fighting ring and a search for the killer dog and its owner.

5The Perfect Pieces in the Purple Pond

43 minSep 24, 2008★ 8.2

The pieces of a dismembered body are found lying in a purple pool of water, except the head is missing. The team finds that the body belongs to Jared Addison, a science fiction writer who had several mental problems. With Sweets' help, several suspects are hunted down, however the team has trouble finding enough evidence with the victim's head still missing.

6The Crank in the Shaft

44 minOct 1, 2008★ 8.0

The remains of a despised office manager are discovered in an elevator shaft, and Booth and Brennan must figure out which employee killed him. After some investigating, they find that the manager had more than a fair share of complaints on file. Meanwhile, Angela and Hodgins try to make peace in the lab after their break-up.

7The He in the She

42 minOct 8, 2008★ 8.2

Booth and Brennan go to investigate a body found in the Chesapeake Bay. After arriving, they find only the upper torso, giving the team little to work with other than remnants of the victim's breast implants. Brennan and Booth are led to a small church in Maryland, where they find that the victim was a pastor. When the team finds the lower half of the body, they learn that their initial assumptions may not been incorrect.

8The Skull in the Sculpture

44 minNov 5, 2008★ 7.1

When the smashed remains of a well known artist are found in an impounded junkyard car, Booth and Brennan are on the case to find out if foul play is to blame for his death. With suspects ranging from the artist’s rival to his own assistant, the team must race against the clock to find evidence of murder before the car is relinquished and put on exhibit as the sculptor’s ultimate display of self-sacrifice for the sake of his art.

9The Con Man in the Meth Lab

44 minNov 12, 2008★ 7.1

Booth’s Brother Jared Booth and Brennan investigate the scene where a body was uncovered during a botched practice police raid. The team identifies the body as a struggling inventor’s father who had recently reunited with his son. But when a second body surfaces, the team is led on a trail of deception to find out who was the actual con-man in the inventor’s life. Clark Edison returns to the lab, and he and Hodgins work on piecing together blueprints from one of the inventor’s potentially valuable inventions. Meanwhile, Brennan likes Booth's brother and goes out on a date with him. She learns a thing or too about Booth's past while out on the date.

10The Passenger in the Oven

44 minNov 19, 2008★ 8.0

While en route to China to identify prehistoric anthropological remains, Booth and Brennan are called upon to solve a murder in midair when the flight attendant discovers a fully cooked human body in the plane's microwave.

11The Bone That Blew

43 minNov 26, 2008★ 8.0

Brennan's father Max lands a teaching position at the Jeffersonian. When he ends up helping out with the murder case at hand, Brennan is noticeably bothered by his sudden presence in her professional life.

12Double Trouble in the Panhandle

44 minJan 22, 2009★ 8.1

A shallow grave holds the remains of conjoined twins; Booth and Brennan infiltrate a circus community after they discover that the twins were jugglers there.

13Fire in the Ice

44 minJan 22, 2009★ 7.7

When a volunteer fireman is murdered at an ice rink, Booth and Brennan begin the investigation, but Booth must excuse himself due to a conflict of interest. When details come to light, Booth becomes a suspect in the homicide.

14The Hero in the Hold

44 minFeb 5, 2009★ 7.9

While trapped and trying to escape from a ship in the middle of the ocean, Booth is haunted by strange hallucinations.

15The Princess and the Pear

44 minFeb 19, 2009★ 7.8

The team investigates a sci-fi convention when a woman in a medieval princess dress is found murdered. With Booth's back injured, Agent Payton Perotta steps in once again to help

16The Bones That Foam

44 minMar 12, 2009★ 7.8

When newlyweds encounter a corpse while bungee-jumping off of a bridge, Brennan and Booth are sent to investigate. After determine the cause of death was not suicide, the team at the Jeffersonian discover an unknown substance coming from the body. This sends the lab into lockdown and have only 24 hours to uncover the murderer before the body disintegrates.

17The Salt in the Wounds

44 minMar 19, 2009★ 7.8

The body of a pregnant 16-year-old athlete found buried in a mound of salt in a city de-icing truck leads Booth and Brennan to the discovery that many of her teammates are pregnant or have babies after a pregnancy pact.

18The Doctor in the Den

44 minApr 2, 2009★ 7.1

When the half-eaten body of Cam's former fiancee is found in the tiger cage at the zoo, Booth and Brennan uncover that his death was far from accidental. Now the team must put the pieces of the fiancee's final day back together, including hypnotizing a suspect in order to spark his memory.

19The Science in the Physicist

43 minApr 9, 2009★ 7.2

Booth and Brennan are sent to investigate when human remains are found during a photo shoot. When the team uncovers a meteorite in the victim's ear, they are led to the Collar Institute of Science in D.C.

20The Cinderella in the Cardboard

44 minApr 15, 2009★ 7.4

Booth and Brennan are called when an image of the Virgin Mary is found in a bale of compressed cardboard.

21Mayhem on a Cross

44 minApr 16, 2009★ 8.2Now viewing

When it is discovered that a stage prop used by a Norwegian death metal band is in fact a real human skeleton, the remains are sent to the Jeffersonian when authorities determine the victim was an American citizen.

22The Double Death of the Dearly Departed

43 minApr 20, 2009★ 7.5

When a Jeffersonian coworker dies of heart failure, the entire team goes to the wake where, upon viewing the body, Brennan realizes the death was no accident.

23The Girl in the Mask

43 minApr 23, 2009★ 7.9

Booth's detective friend from Tokyo, Ken Nakamura, calls him when his sister, Sachi, goes missing while in Washington, D.C. With Brennan, Booth investigates her disappearance.

24The Beaver in the Otter

43 minApr 30, 2009★ 7.5

When a human body is found inside the strung up Otter mascot uniform of a rival school, Brennan and Booth investigate whether the body inside the costume was dead beforehand, or killed during a Middlesex University bonfire event. The body is identified as Jimmy “Beaver” Bouvier, a fraternity brother at Middlesex University. When Brennan and Booth question his fraternity brothers, they learn that Beaver had a money-making operation on the side and was making a killing of his own. Meanwhile, Booth offers to help his brother Jared find a new job after being dishonorably discharged from the Navy.

25The Critic in the Cabernet

44 minMay 7, 2009★ 8.3

The team is on the case when human remains are found inside a barrel of wine during a wine tasting. When the victim turns out to be a wine critic whose scathing reviews were capable of sending a vineyard to its ruin, everyone from the winery's owner to the victim's own wife becomes a suspect.

26The End in the Beginning

44 minMay 14, 2009★ 7.7

In the season finale, a dead body is found at a club called "The Lab." The team has to do some unexpected and unusual things that have to do with this club. Brennan and Booth may become a couple.