"Chuck Versus the Gravitron" is the eighth episode of the second season of Chuck. It was broadcast on November 24, 2008. Chuck, Sarah and Casey are shocked to discover that Chuck's girlfriend Jill is a Fulcrum agent in search of the Intersect. In the wake of his disbelief, Chuck is asked to use his relationship with Jill to get to an agent called Leader.
Plot
In 2003 Chuck and Jill sit atop a Ferris wheel as Chuck tries to ask Jill out. Back in the present, Sarah and Casey worry about Chuck after finding out Jill is Fulcrum and that she has Chuck. Jill is in bed with Chuck at a hotel. When Jill leaves to take a shower Chuck flashes on her cell phone and realizes she's a Fulcrum agent. Back at Chuck's apartment, Chuck kisses Jill goodbye, pretending absolutely nothing is wrong. Inside his sister's house, Chuck feels sorry for himself, while General Beckman tells them the flash in Jill's room referenced an agent called Leader. Chuck must stay close to Jill to find him. Chuck and Jill go to a carnival where Jill tells Chuck she's Fulcrum and they run into Leader, who Jill betrays to protect Chuck. However, Leader escapes and Jill is captured. At the castle Casey and Sarah interrogate Jill with a lie detector and she gives them the location of a Fulcrum hospital currently treating Leader. Casey and Sarah go after him while Chuck talks to Jill about Stanford and Bryce. Sarah and Casey return to headquarters to find Chuck sitting at a desk, head in his hands. Jill emerges from behind the corner holding two guns. She makes them uncuff Leader and drop their weapons. Leader accesses the computer and begins searching for someone. Jill tells Chuck he is looking for Bryce Larkin, because they think he is the Intersect. Chuck is put in a glass cell opposite Sarah and Casey. Chuck uses the Castle manual to lock Leader and Jill out of the computer system, jam the communications, and summon the CIA. However, Leader attaches a mine to Sarah and Casey's door, demanding Chuck open the door or they die. Chuck opens the door and is taken out of Castle, but he sends a message to Sarah and Casey that he also unlocked their door and is leading them to Buy More. After Leader falls over one of Jeff's trip wires, Casey starts fighting him while Sarah looks for Jill. Leader defeats Casey but is knocked out by Big Mike, who came back from his fishing trip after being notified of a "security breach". Chuck leads Jill to one of the Nerd Herd vehicles, telling her to get away in it. But once she is inside, he puts the car in "detention mode," automatically handcuffing her to the wheel. He admits he was going to let her get away, but when she was about to kill Sarah, he changed his mind. Outside Sarah tries to comfort Chuck before going inside, and when they do, Ellie, Jeff, Lester, Morgan and Awesome are waiting to celebrate Thanksgiving.
Buy More/Family
Ellie is furiously trying to clean the house in preparation for the arrival of Devon's parents. She also tells Morgan that he cannot come to dinner. Big Mike tells Jeff, Lester and Morgan that he needs them to guard the store because it will be full of product in preparation for Black Friday. On Thanksgiving Day, Morgan hatches a plan: He will venture outside the store to find a real turkey for Thanksgiving. Jeff hot wires the front door allowing Morgan to slip out. Unfortunately, the plan inadvertently sets off the silent alarm. Big Mike, relaxing on a fishing trip, looks down at his phone to see security breach flashing in red. At Ellie's place, Devon's parents are not coming to dinner after all. Ellie is so overjoyed that she does not get angry upon discovering Morgan digging through the trash for turkey scraps. She re-invites Morgan, who in turn invite Jeff and Lester. In the end, Ellie, Jeff, Lester, Morgan, Awesome, Sarah and Chuck celebrate Thanksgiving.