''Cuckoo'' is a 2012 comedy series on Creator/TheBBC, starring Andy Samberg, Greg Davies and Helen Baxendale.

It revolves around Ken and Lorna, a couple of middle-England parents who go to pick their daughter Rachel, a promising medical student with a university placement at Bristol, up from the airport upon her return from her gap-year travels only to get a bit of a shock when she reveals she has gotten married to Cuckoo, a modern young NewAgeRetroHippie type. As Rachel is busy sorting out her educational future and Cuckoo is in the process of writing a self-help book that he is convinced will put him somewhere between Jesus and Gandhi, they move back into the family home, an arrangement that works very well for them but less so for Ken. For while Cuckoo's eccentric ways manage to win over Lorna, strait-laced Ken is hardly convinced, perceiving himself as the OnlySaneMan while his home is invaded by an idiot with a questionable perception of personal space.

Throw in Rachel's horny, apathetic, self-obsessed teenage brother and you've got the basic formula for ''Cuckoo''.

!!The series provides examples of the following tropes;

* AlternateCharacterInterpretation: [[InvokedTrope Invoked]] by Ken, who initially believes that Cuckoo is a conman who tricks naive young women into marrying him, all the while fleecing their rich parents for money.
* BiggerIsBetterInBed: Occasionally alluded to.
* BritishBrevity
* CannotKeepASecret: Lorna is completely incapable of not telling everybody any secret. As such everybody at the surprise wedding announcement already knows.
* ChekhovsGun: The Korean War Rifle in "Grandfather's Cat".
* {{Cloudcuckoolander}}: Do we really have to say who?
** As well as the obvious, Lorna herself is a bit spaced out at times, although nowhere near to the degree that Cuckoo is.
* CringeComedy: The show is basically setting Ken up for these one after the other.
* DaddysGirl: It seems that Rachel was this, before Cuckoo turns up of course.
* JerkassHasAPoint: Ken is definitely not very welcoming, friendly or pleasant to Cuckoo, but given that Cuckoo, while essentially well-meaning, nevertheless quite easily comes off as both an annoying sanctimonious idiot with questionable ideas that he himself barely seems to understand yet will not hesitate to smugly lecture others about at the drop of a pin, and as a sponger with little concept of personal space or appropriate conduct in someone else's home while being quite happy to leech off that someone else's generosity indefinitely, Ken's resentment is fairly easy to understand.
* MeaningfulName: Cuckoo has basically invaded Ken's 'nest' and set up home there. He also spends most of his life [[{{Cloudcuckoolander}} with his head in the cloud]].
* MistakenForPedophile: Ken after inviting a young girl over to a party, and then later having discovered to have close ups of the girl swimming on his camera is caught up in one of these. It was of course Dylan who wanted the girl to come to the party and who took the photos.
* NakedPeopleAreFunny
* NoisySexNextDoor
* NotSoDifferent: It's suggested a couple times that Ken wasn't so different from Cuckoo when he was growing up.
* OddCouple: Not a couple persay, but much of the comedy is driven by the personality clash between head-in-the-clouds idealist hippy Cuckoo and cynically down-to-earth everyman Ken.
* OnlySaneMan: What Ken believes he is at any rate.
* OverprotectiveDad: A big part of the reason Ken isn't very fond of Cuckoo.
* RefugeInAudacity: After Dylan walks in and cheerfully admits that he lost his virginity to a prostitute at Cuckoo's stag do, Lorna immediately assumes he's lying.
* ShowerOfLove: Discussed
* TalkingInBed: Ken and Lorna often do this.
* WideEyedIdealist: Cuckoo initially believes his book will change the world for the better. He figures out this isn't practical given the current need for a job and decides selling potatoes will do the job as well.