A visit from Raj's sister coincides with Leonard becoming secretive.

Host Alton Brown decides to put the "trick" into his treats with three sinister twists on classic Halloween candies.

Stefan and Damon decide on a new plan to deal with Katherine at the Lockwood's masquerade ball. Katherine calls on an old friend, Lucy, to attend the ball with her.

Bonnie, Jeremy and Alaric all do what they can to help Stefan and Damon, but Katherine has a surprise planned that none of them could foresee. Things take an ugly turn when Matt and Tyler start doing shots with their friends.

When some of the Greendale staff and students ingest a bio-hazardous substance, they start to develop flu-like symptoms and turn into zombies. The group will have to save the others and themselves when the Dean locks them in with the infected.

Ed is embarrassed by an article Henry writes about him; Bonnie and Vince make friends with an 'it' couple.

The CSI team investigate the murder of a man whose daughter was killed five years ago, and the bizarre death of a young man who appears to have been killed by a T-Rex.

A documentary crew visits the hospital six months after the shooting to document the road to recovery for doctors and patients; Meredith helps Cristina put on a brave face for the cameras.

The Dunder Mifflin staff have a Halloween costume contest. Michael's upset after Darryl gives an idea to corporate without running it by him first. Pam tries to make Danny open up about their dating past.

Alex informs Nikita that one of the recruits has been activated to carry out a suicide mission. Nikita intercepts the recruit just as Michael arrives, and the two sides exchange gunfire. Meanwhile, back inside the walls of Division, another recruit decides to attack several guards, creating mass chaos.

The thread of Season 8 episodes ends in the conclusion of the finale, which irons out the style trials and reveals the winning clothier

Excited about Halloween, Todd tries to get the office in the holiday spirit, but his co-workers have no idea what Halloween is all about. After a series of Halloween pranks and an attempt to explain why people dress up, Todd decides to throw a costume party. Taking advantage of the social setting, Todd tries to get closer to Asha, but the plan backfires when Tonya makes a pass at Todd.

Each team is given an up-and-coming musical, and tasked with producing a backer's audition for potential investors. One project manager admits to knowing nothing about musical theatre, but then sends away a concert pianist on their team. On the other team, a sidelined candidate takes over creative control. Broadway star Kristin Chenoweth helps judge each presentation, and the past comes back to haunt one teammate in a shocking boardroom, before Mr. Trump sends another candidate packing.

When the guys learn that Dee is pregnant, they attempt to piece together what transpired at last year's Halloween party to figure out who's the father.

A comatose, pregnant patient puts a strain on Addison and Sam's relationship when they disagree over treatment. Pete and Charlotte are in an ethical dilemma about whether to reveal an auto accident victim's HIV status. Violet gets caught up in Lucas's first Halloween which puts her at odds with Pete's family.

The case of a murder and missing person on an intensely secure wealthy family's compound perplexes Jane and the CBI team.

The cast reunites to talk about everything that happened in Miami.

Mysterious places can be found around the Earth, and, inexplicably, UFOs are often sited near these mystical areas. Planes and ships unaccountably disappear in the infamous Bermuda Triangle. Strange magnetic anomalies in Mexico's Zone of Silence have not only drawn missiles off their course, but seem to pull meteorites out of the sky.

Kevin convinces everyone to come to the suburbs for Halloween. Ruxin cracks under the pressure of his matchup with Pete. Taco steals a monkey.

Last day in Washington

Maira Kalman

Will Ferrell, Kid Cudi

Denzel Washington, Corinne Bailey Rae

The team is put to the test when a group of Afghan asylum seekers take control of Frankston's Peninsula Centre, and hold many people hostage, including the son of the Minister for Immigration. TR must rely on an interpreter, who may not be all she seems.

Princess Celestia has given two tickets to the Grand Galloping Gala to Twilight Princess, but arguments among her friends start as they all want to be the one to accompany her to the gala, for their own personal reasons. Things get more complicated as they all start to do her personal favors to get on her good side.

Tiff tests a Vauxhall against an Audi. Vicki takes a closer look at the new luxury SUV. Jason test drives an Audi supercar whilst Jonny enters his first ever competitive trackday event.

The panelists on this episode are Dara O Briain, Chris Addison and Sean Lock.

A debutante's abduction with links to the past troubles in Northern Ireland end up giving the team another complex cold case to solve.

The award-winning host is joined by Apprentice star Lord Alan Sugar; Strictly Come Dancing's Pamela Stephenson; and top comic Lee Mack. Plus James Blunt performs his new single.