It has been implied that David Caspe's previous sitcom Happy Endings, which aired on ABC from 2011 to 2013, exists in the same universe as Marry Me.Both shows are set in Chicago and Derrick, a recurring character played by Stephen Guarino, appears on both shows.Tensions mount after Annie and Jake discover one of them has already watched the highly-anticipated season finale of their favorite program, that they had recorded to watch together.Meanwhile, Dennah, Gil and Kay get caught up with a pair of police officer swingers Gary Thick (Rob Riggle) and Laguna Matata (Natasha Leggero).Meanwhile, Gil discovers the strange world of underground cheese tasting.
Kay's vengeful former girlfriend takes out her anger on Jake by wiping out his identity records.
Three of the original six series regulars – Casey Wilson, Ken Marino and Sarah Wright Olsen – also appeared on Happy Endings, albeit in different roles.
John Gemberling also appeared on Happy Endings, however as his character wasn't named — he was merely credited as 'Thief' — it is unclear whether the two characters are considered separate people.
Following several more botched proposals, they finally get engaged and Annie reconciles with everyone she insulted.
After Jake moves into Annie's apartment, she feels the stress of sharing her space with someone and slowly begins moving into her car; Gil becomes obsessed with an all-you-can-eat buffet; Dennah tries to change her look.