Gregory Michael

Ted, Marshall and Barney embark on another "trilogy time," where they get together every three years to watch the "Star Wars" trilogy and envision what their lives will be like in another three years. Meanwhile Barney and Quinn move in together.

The fallout from the float prank leads the Kappa Tau house to plan an "End of the World" party - which leads to revelations from everyone.

Rusty prepares for his first date with Jordan, but due to a series of events, Casey ends up tagging along. Cappie and Evan must each reveal a secret.

It’s the day after the End of the World party which has changed some people’s lives dramatically. Max has gone back to England since Casey broke his heart, so Rusty has no one to talk to about his choice to go to the party over finishing his Chemistry project. He tries to get into the lab but finds it locked. Jordan implores Casey to help Rusty who is now failing the Honors Program. Casey, still hurt from her encounter with Cappie at the party, agrees to take charge and help her brother. When they try to get into the lab, Cappie shows up also intending to help Rusty. The three awkwardly get the project done but not without confronting each other about what really happened the night before and what it means for Casey and Cappie. Rebecca is mysterious about hooking up with a guy at the previous night’s party, and offers to pay Evan if he will pretend to be that guy. The Omega Chi’s throw a Dead Man’s party to celebrate the start of the Gotcha! Game, and Evan has to endure being Rebecca’s new boyfriend until she shocks everyone with a “breakup”. Calvin thinks he slept with Grant, but finds out they just kissed while Dale slept with Sheila and is extremely upset about losing his virginity. When Casey and Cappie have a moment on campus where she shoots him as part of Gotcha!, he flashes back to the End of the World party when Evan talks him out of chasing after Casey explaining they’re just not right for her.

Ashleigh has plans for ZBZ to get back on top with a 4-way party between ZBZ, Gamma Psi, Omega Chi and Lambda Sig. The Gamma Psi sisters turn down the invite so Ashleigh blurts out to Gamma Psi president, Natalie, that ZBZ will pay their electric bill for the rest of the school year if they agree to attend. Natalie accepts the offer and promises her girls will be there. Ash spares no expense planning the party, using pretty much all of the money the girls raised at Founder’s Day to Casey’s dismay. The 4-way is in full swing when Natalie informs Ashleigh that the Gamma Psi’s are leaving. When she’s questioned as to why she lets it “slip” that Ashleigh paid for their electric bill – setting off an angry OX, and the other ZBZ sisters embarrassed that it’s come to bribing people to party with them. Evan is starting to lose control of the house when it’s revealed that he gave up his trust fund and the younger actives start standing up to his decisions as president. Calvin realizes that Grant might not be ready to come out to the house, and when he sees that Grant is a part of the OX revolt he reconsiders if the relationship is worth saving. Lana tries to corrupt Rusty when she, Rusty and Cappie hang out together. Rusty tells Cappie she’s perfect for him since she’s just like him, but Cappie thinks otherwise.