Annie presents Troy with a universal translator as a going-away present from the group. Britta is convinced that everyone is acting happy to avoid processing their feelings. Dean Pelton makes an announcement over the intercom that he has approved Abed's suggestion of a massive, school-wide game of "Hot Lava." Abed ups the stakes by saying that the winner will receive $50,000. The school is sent into a panic and the game begins.

Britta thinks the lava symbolises Abed's fear of change. She is almost knocked into the lava by Professor Duncan before joining up with Jeff and Annie. The three of them are nearly defeated by a misfit gang of "Locker Boys," led by Chang, before Troy and Abed swoop in. Professor Buzz Hickey then takes down the "Locker Boys," and Chang screams for Nathan Fillion in his final moments (a humourous nod to Nathan Fillion's frequent professions of love for the show on Twitter).

Britta is abandoned by the gang, who head for "Shirley Island." Some of them express remorse over "leaving her for dead," but before long, Shirley Island is attacked by Britta, Professor Hickey, and a gang of "chair walkers." A battle ensues, Jeff and Britta fight both physically and verbally, and eventually Jeff is knocked to the floor. Shortly thereafter, Troy and Abed roll through in a giant bubble that Hickey punctures with a small knife. Britta climbs on board Hickey's vehicle as they chase after Troy and Abed's gradually deflating ball. Britta jumps on their ball and shouts that they must confront their feelings. Troy and Abed escape and in the midst of regrouping, Abed confesses that he sees the lava as real because Troy is leaving. Britta pushes Hickey into the lava when she realises the enormity of what Abed is going through and the scene climaxes with Abed "letting go" and falling into the lava.

Britta and Troy discuss what to do about Abed. Troy is prepared to sacrifice himself by jumping into the lava, but Britta stops him and says that she can "fake-fix" him by "cloning" him, based on the comic that Abed had. She pretends to do so, and Abed rises from the lava, saying that Britta's work was sloppy and that he is not an exact copy. Instead, he is a less emotional version of Abed and will be able to let Troy go. The group all gathers at the end and say their goodbyes to Troy. There is also an appearance from LeVar Burton, who will be accompanying Troy on his journey.

This episode marks the final appearance of Donald Glover. Community airs on Thursdays on NBC at 8/7c.

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The study group returns to the study room after Pierce's funeral. They meet Mr. Stone, who is Pierce's executor. Pierce's will required an investigation of his death and several people, including all of the study group must be questioned as potential murder suspects. They must all undergo an apolygraph examination. Through the course of the questioning, each study group member has personal secrets revealed to the rest of the group and conflict ensues. These secrets include Troy and Abed using Jeff's Netflix, Annie overcharging Troy and Abed for rent, Annie's drugging the group to help them study for a big test, Abed putting tracking devices on everyone, Shirley's donating money to an anti-abortion organisation, Abed cat-fishing Annie in order to get pancakes (which she makes when in a good mood), Jeff making Abed apply for handicapped parking so he could get a better spot, Britta inviting Garrett to Annie's birthday party... it goes on and on. Jeff gives one of his speeches and they decide to see the questioning through. For money. Pierce's final words to the individual group members are surprisingly kind and uplifting. Britta receives an iPod, Annie a tiara, Shirley a timeshare in Florida, Jeff a bottle of scotch, and Troy receives the bulk of Pierce's fortune under the condition that he sail Pierce's boat around the world as becoming-a-man-ritual. Additionally, each group receives a frozen sample of Pierce's sperm. Troy agrees to take on Pierce's task; this was a task given to Pierce by his own father but Pierce cheated and never completed it, which caused him life-long regret. The group is shocked, Abed in particular. Later, Mr. Stone is drunk in a bar with the group and reveals that Pierce dyed from dehydration as a result of filling all the sperm-filled-cylinders that the group received.

Community airs on Thursdays on NBC at 8/7c.

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Greendale finds itself under attack by the Ass-Crack-Bandit. Victims will have a coin dropped down their crack when bent or leaning over. Jeff and Annie investigate and Professor Duncan offers up his services. Troy becomes a victim, and Annie deduces that the ACB is likely a teacher. Jeff and Annie trace a call from the ACB to the campus stables, where they discover Star-Burns, who is not only still alive, but has been living in the stables. He confesses to being the ACB. During a dance celebrating the capture of the ACB, Star-Burns confesses that he lied about being the ACB and Annie begins to suspect Professor Duncan of being the true culprit. Though at first, she appears to be right, Professor Duncan eventually becomes a victim himself. Shirley informs the group that Pierce is dead and the group mourns the loss of their friend. The investigation is called off, Star-Bruns officially retracts his confession, and the episode ends with the implication that multiple main and supporting characters may be the true ACB. This mystery will live on to another day... or episode(s)...

Community airs on Thursday on NBC at 8/7c.

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