Season 4

01 Yanks in the U.K. (1) Episode 13rd September 2008 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. 02 Yanks in the U.K. (2) Episode 23rd September 2008 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. 03 The Man in the Outhouse Episode 310th September 2008 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. 04 The Finger in the Nest Episode 417th September 2008 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. 05 The Perfect Pieces in the Purple Pond Episode 524th September 2008 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. 06 The Crank in the Shaft Episode 61st October 2008 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. 07 The He in the She Episode 78th October 2008 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. 08 The Skull in the Sculpture Episode 85th November 2008 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. 09 The Con Man in the Meth Lab Episode 912th November 2008 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. 10 The Passenger in the Oven Episode 1019th November 2008 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. 11 The Bone That Blew Episode 1126th November 2008 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. 12 Double Trouble in the Panhandle Episode 1222nd January 2009 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. 13 Fire in the Ice Episode 1322nd January 2009 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. 14 The Hero in the Hold Episode 145th February 2009 While trapped and trying to escape from a ship in the middle of the ocean, Booth is haunted by strange hallucinations. 15 The Princess and the Pear Episode 1519th February 2009 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 16 The Bones That Foam Episode 1612th March 2009 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. 17 The Salt in the Wounds Episode 1719th March 2009 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. 18 The Doctor in the Den Episode 182nd April 2009 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. 19 The Science in the Physicist Episode 199th April 2009 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. 20 The Cinderella in the Cardboard Episode 2015th April 2009 Booth and Brennan are called when an image of the Virgin Mary is found in a bale of compressed cardboard. 21 Mayhem on a Cross Episode 2116th April 2009 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. 22 The Double Death of the Dearly Departed Episode 2220th April 2009 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. 23 The Girl in the Mask Episode 2323rd April 2009 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. 24 The Beaver in the Otter Episode 2430th April 2009 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. 25 The Critic in the Cabernet Episode 257th May 2009 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. 26 The End in the Beginning Episode 2614th May 2009 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.