Epidemiology (Community)

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Community episode
Community S02E06 - Epidemiology.jpg
Jeff and Britta at Greendale's Halloween party.
Episode no. Season 2
Episode 6
Directed by Anthony Hemingway
Written by Karey Dornetto
Production code 206
Original air date October 28, 2010 (2010-10-28)
Guest appearance(s)
Episode chronology
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"Epidemiology" is the sixth episode of the second season of the American comedy television series Community, and the 31st episode of the series overall. It originally premiered in the United States on NBC on October 28, 2010 as a special Halloween-themed episode.[1] In the episode, the Dean throws a Halloween themed party on campus. During the party, a few of the partygoers become sick from eating an unknown substance, that the Dean mistook for taco meat, bought in an army surplus store. The sickness causes those affected to turn into a violent, zombie-like state that can be passed on through bites. As the study group try to escape, the Dean (under orders from the army) locks the doors, trapping them inside with the infected.

The episode was written by Karey Dornetto and directed by Anthony Hemingway, and also features the voice of George Takei. The episode's plot is a parody of various zombie and horror movies, with the infected students mimicking stereotypical zombies and various tropes of the genre being mocked. The episode received overwhelmingly positive reviews and was watched by 5.6 million viewers on its original airing.


Outside the Greendale Community College library, Jeff (Joel McHale), dressed as David Beckham, greets Pierce (Chevy Chase), who is dressed as Star Trek's Captain Kirk for the annual Greendale Halloween party. The pair walk inside, where all the songs being played are by the 1970's pop group ABBA and Pelton's voice notes to himself (given that they are using his iPod for the music). Jeff confronts Dean Pelton (Jim Rash), who is dressed as Lady Gaga, over the less-than-tasty food being served at the party. Pelton refuses to say where he got it, until Jeff reveals Pelton bought it at an army surplus store. Suddenly, Pierce begins sweating. When Annie (Alison Brie) finds a doctor, they discover that Pierce is running a temperature of 102°F. While Troy (Donald Glover) and Abed (Danny Pudi) attempt to court women with their Aliens-inspired costumes, the nature of the mysterious sickness (which has by now been transmitted to several others at the party) takes a bizarre turn when Pierce bites Star-Burns (Dino Stamatopoulos) in the arm.

The main characters (except Pierce) continue to enjoy the party, despite noticing that many of those attending the event appeared to be "high on drugs". Troy, who has by this time changed out of his science-fiction style costume and opted to dress as a shirtless Dracula, calls Abed a nerd, hurting his feelings. Meanwhile, at his office, Dean Pelton telephones the army surplus store where he purchased the party food and discovers he had purchased something other than food. Pelton is transferred to an army special operations officer, who advises the Dean to quarantine those inside the library and wait for the army to arrive.

At the party, Leonard (Richard Erdman) savagely bites a woman, and Troy and Abed realize that they are in the midst of a zombie attack. The unaffected partygoers try to escape through the library's front door, only to find that the Dean has locked it from the outside, sealing all those inside the library with the zombies. The remaining survivors barricade themselves in the group study room.

When Rich (Greg Cromer), the doctor who helped Pierce earlier in the episode, explains that all of the zombies will suffer brain damage and death within six hours, Annie insists that they need to help them, but Jeff argues against it. Annie suggests that they lower the temperature in the building to lower the zombies' fever and kill the virus, which Rich agrees could work. However, the thermostat is outside with the zombies. The group bickers over the thermostat plan, and after Rich describes the symptoms of a zombie bite, he begins exhibiting them himself, having been bitten earlier. Britta (Gillian Jacobs) is also revealed to have been bitten. Chang (Ken Jeong) throws an ice skate at the pair in an attempt to knock them out, but ends up breaking a window and allowing the zombies to surge in and grab Annie.

The group flees the study room and splits up. Shirley (Yvette Nicole Brown) and Chang escape to a nearby bathroom, where they share a passionate moment together. Jeff, Troy and Abed get to the library's basement, where they spot a window. However Jeff, not wanting his expensive suit to get dirty by going through the window, opens a door instead, letting in the zombies from the other side. Jeff is overpowered by the horde. Abed encourages Troy to "be the first black man to make it to the end" and sacrifices himself, allowing Troy to escape through the window.

Once outside, Troy forcibly takes the keys from Dean Pelton and reenters the building to get to the thermostat. Abed and Shirley bite Troy, but he is able to reach the thermostat before turning. After the air conditioning comes on, everyone is healed. The army then arrives to "disinfect" the building (as well as ensure that the Dean is the "only witness"). Upon discovering those inside are uninfected, they opt to erase everyone's memories. In the aftermath, the party-goers assume the drinks were roofied.

In an ending tag scene, Troy listens to a voicemail message from Chang sent moments before his becoming infected, bragging that he and Shirley "totally did it".


The episode was written by producer Karey Dornetto, her third writing credit on the series. It was directed by Anthony Hemingway, his first directing credit for a half-hour comedy series. He has previously directed episodes for The Wire, Battlestar Galactica, CSI: NY, and True Blood.

The following songs by the Swedish pop music group ABBA are featured throughout the episode: "Waterloo", "SOS", "Dancing Queen", "Gimme! Gimme! Gimme! (A Man After Midnight)", "Mamma Mia" and "Fernando".

This episode featured a special Halloween-themed opening credit sequence, unique to this episode.[1] Series creator Dan Harmon later stated on his Twitter account that he paid for the changed opening credits himself, as it wasn't in the network's budget.[2]


In its original American broadcast, "Epidemiology" reached approximately 5.635 million households with a 2.4 rating/7% share in the 18–49 demographic. It was the least-watched non-reality component of NBC's Comedy Night Done Right for that evening (only The Apprentice, a reality show, scored lower).[3]

Alyssa Rosenberg from The Atlantic praised the episode, saying, "Community's on a roll with episodes torn straight from the reels of classic movies this season, and last night's Halloween episode lifted the show to new heights: this may have been the best half-hour of Community since "Contemporary American Poultry" and "Modern Warfare."[4] Sean Gandert of Paste Magazine also found the episode to be one of the series' best, writing, "Community gets things so, so right. This is one of those special episodes that really pushed the boundaries of the show, and honestly, I even preferred it to 'Modern Warfare'—this may be the best episode of the show so far."[5]


  1. ^ a b VanDerWerff, Todd (October 28, 2010). "Community: "Epidemiology"". A.V. Club. The Onion. Retrieved March 31, 2015.
  2. ^ Harmon, Dan (October 28, 2010). "Actually, I paid for those out-of-pocket. #COULDNOTWAITTOSAYTHAT". Twitter. Retrieved March 31, 2015.
  3. ^ Gorman, Bill (October 29, 2010). "Thursday Final Ratings: Grey's Anatomy, Big Bang Theory, Shrekless, Office Adjusted Up; Nikita Down; Plus World Series Game 2". TV by the Numbers. Retrieved March 31, 2015.
  4. ^ "'Community': Zombies + 'Wizard of Oz' = Awesome". The Atlantic. October 29, 2010. Retrieved October 30, 2010.
  5. ^ Gandert, Sean (October 29, 2010). "Community Review: "Epidemiology" (2.6)". Paste Magazine. Retrieved October 30, 2010.

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