''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''.

Series 2 introduced two major cast changes: Tamla Kari (Rachel) was replaced by Esther Smith, and Cuckoo was written out because of Andy Samberg's other work commitments and replaced by his long lost son Dale (TaylorLautner). It also introduced a new regular character in the form of Rachel's new boyfriend Ben (Matt Lacey); a safe and boring solicitor who works with Ken and Rachel.

!!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.
* AshesToCrashes: At Dr Rafferty's funeral, [[spoiler: the urn gets dropped and shatters on the ground when the funeral party see Dylan [[MakingLoveInAllTheWrongPlaces getting a handjob]] ]] as they go to the rose garden to spread the ashes.
* BigDamnHeroes: In the last episode of Series 2, [[spoiler: Dale saves Rachel's life by pushing her out of the way of Steve's car which is in the middle of a high speed pursuit.]]
* BiggerIsBetterInBed: Occasionally alluded to.
* BloodyHilarious: At a dinner party where Rachel and Ben try to set him up with their friend, Dale performs a friendship ritual from his cult at said friend's request. The ritual consists of touching one person and saying "Friend, take my trust", touching a second and saying "Friend, take my love", and [[spoiler: [[TheLastOfTheseIsNotLikeTheOthers slicing his palm open with a big knife, saying "Friend, take my blood", and rubbing his bleeding hand all over a third person's (in this case, Ben) face]].]]
* BritishBrevity
* BrickJoke / FunnyBackgroundEvent: In one of the first scenes of the Series 2 finale, Dale impresses a police officer by expertly and rapidly twirling his telescopic baton. In one of the episode's final scenes when the same police officer is talking to Ken, two officers in the background are attempting to replicate this.
* ButtMonkey: Ben.
* CannotKeepASecret: Lorna is completely incapable of not telling everybody any secret. As such everybody at the surprise wedding announcement already knows.
* CannotTellALie: Dale as he was raised to believe that if he lies, his testicles will fall off.
* TheCastShowOff: In the Series 2 finale, TaylorLautner (a blackbelt since the age of eight) gets to show off his martial arts skills.
* 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.
* DawsonCasting: Zoe is around 16 at the start of Series 1 (2012) while Holly Earl was born in 1992.
* DramaticDrop: [[spoiler: The [[AshesToCrashes urn containing Dr Rafferty's ashes]].]]
* TheFunInFuneral: Episode 4 of Series 2 is made of this trope. Ken lends a very rare book that's worth [[spoiler: 1,000]] to his dying history lecturer Dr Rafferty, who wants to read it before he dies. Rafferty dies earlier than expected and Ken goes to the funeral (dragging Lorna and Dylan along) to get the book back, and Dale goes because his unexpressed grief over Cuckoo is causing him to take Rafferty's death very hard. At the funeral; [[spoiler: Dale is mistaken for Rafferty's gay American lover, Ken steals the book out of Rafferty's niece's bag (unaware that a passage from it is to be read at the funeral) and swaps it for "A History Of Genocide", and Dylan gets off with Rafferty's great niece Chastity.]] It all culminates with [[spoiler: Dale publicly reading a passage about genocide in the Kmehr Rouge as part of the service, Ken and Rafferty's niece having an angry back and forth about the ownership of the book during a part of the service where mourners are invited to share their memories of the deceased, the reveal that Dale isn't Rafferty's lover, and the entire funeral party going to Rafferty's rose garden to spread his ashes only to see Dylan [[MakingLoveInAllTheWrongPlaces getting a handjob]] from Chastity.]] Cue a DramaticDrop of [[spoiler: the urn.]]
* HappilyMarried: Ken and Lorna have been married for around twenty years, are still very much in love, and serious rows are incredibly rare.
* HugeGuyTinyGirl: Ken and Lorna. Although Helen Baxendale isn't exactly short (5'6"), Greg Davies is 6'8".
** To a lesser extent, Dylan and Zoe also count. Tyger Drew-Honey isn't overly tall (5'10") but Holly Earl is very petite at 5'0" and frequently plays characters [[DawsonCasting much younger than her actual age]].
* 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.
* MakingLoveInAllTheWrongPlaces: In an attempt at being more spontaneous, Rachel and Ben have sex in the stationary cupboard at work. They manage to get away with it until Ken gets the CCTV footage to expose that a rival for the Senior Partner position at the firm is stealing stationary and e-mails it to his boss without looking through it first.
** At Dr Rafferty's funeral, [[spoiler: Dylan gets a handjob in the rose garden during the ceremony.]] And then the funeral party comes over to spread the ashes. [[spoiler: Cue the [[AshesToCrashes urn]] [[DramaticDrop being dropped]] out of shock.]]
* 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]].
** Initially played straight with Chastity, a girl Dylan meets at a funeral. She claims to have been raised in the church since birth but a short while (and some dubious logic from Dylan) later, she is snogging him and ultimately [[spoiler: gives him a handjob.]] While the service is going on. Though thankfully a short distance away from it.
* 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.
* MushroomSamba: Lorna is pulled over and has marijuana in her pocket. She hands it to Ken (which the police officer notices) and he eats it to avoid being arrested. A short while afterwards, he has to defend Steve against (entirely justified) accusations of medical malpractice. HilarityEnsues.
* MyFriendsAndZoidberg: Dale prepares for what his cult believe is the apocalypse by giving each of the family a loving and respectful farewell. Except for Dylan. He tells him that he's insubordinate and needs to treat Ken with more respect before slapping him in the face.
* NakedPeopleAreFunny
* NoisySexNextDoor
* NotSoDifferent: It's suggested a couple times that Ken wasn't so different from Cuckoo when he was growing up.
* PottyFailure: Happens spectacularly to [[spoiler: Dylan]] after [[spoiler: eating a jacket potato topped with a sauce containing fish that had been in the garage for two years]]. Made even worse by the fact that it happens when [[spoiler: he and Zoe are in the bath and about to have sex.]]
* 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.
* TheOtherDarrin: Tamla Kari (Rachel) was replaced by Esther Smith at the start of Series 2.
* OutOfFocus: Ken in the second episode of Series 2 where he only appears at the start and end of the episode. [[JustifiedTrope Justified]] as the storyline of Dylan throwing a party requires him (as the sterner parent when compared to Lorna) to be away from the house.
** Dylan in the third episode of Series 2. He shows up for two lines and one joke that has nothing to with either of the episode's plots, and has less than twenty seconds of screentime.
** Rachel in episode four of Series 2. Because she doesn't go to Dr Rafferty's funeral, she is absent from most of the episode.
* OverprotectiveDad: A big part of the reason Ken isn't very fond of Cuckoo.
** Connie becomes a female variant of this when [[CannotKeepASecret Lorna lets it slip]] that Dylan and Zoe are going to have sex.
* 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.
** This carries over into Series 2 when everybody thinks that he is still a virgin, and always respond to his protests with "Nobody believes that story".
* RomanticFalseLead: [[spoiler: Ben.]]
* SmallNameBigEgo: Connie describes herself as a qualified psychiatrist despite only having done a two day course.
* ShowerOfLove: Discussed
** Dylan and Zoe try the bath variant of this but [[UnderStatement it doesn't go well]]. Specifically, [[spoiler: Dylan has food poisoning and has a [[PottyFailure diarrhoea attack]]. And then Zoe's [[OverprotectiveDad mother]] bursts in.]]
* SuspiciouslySimilarSubstitute: In Series 2, Cuckoo is replaced by his long lost son who moves in with the family, has similar hippy beliefs to his father, and shares the same name.
** Discussed in the second episode of series 2, where despite the similarities, Cuckoo Jr is shown to have more shades of an overly trusting [[NaiveNewcomer naive newcomer]] due to his cult upbringing as opposed to the more independent and opinionated [[NewAgeRetroHippie Cuckoo Sr]].
* TalkingInBed: Ken and Lorna often do this.
* TheirFirstTime: Of the two onscreen instances where Dylan and Zoe try to have sex, the first time they are interrupted by Ken, and the second time [[spoiler: Dylan suffers a PottyFailure when they are in the bath together and Zoe's mother bursts in almost simultaneously with the intent of stopping them.]]
* TooDumbToLive: Cuckoo. [[spoiler: Literally.]] In the first scene of Series 2 [[spoiler: while hiking in the Himalayas, he tries to rescue a mountain goat. Oblivious to the fact that the mountain is its habitat and it is in no danger (despite the Sherpas he is in radio contact telling him this repeatedly) and falls to his death.]]
** This also applies to his son Dale who is barely even capable of crossing the road and [[RunningGag gets run over twice]] in the first episode.
* VomitIndiscretionShot: The climax of [[spoiler: Series 2 Episode 2]] is built around this happening to [[spoiler: all of Dylan's party guests]] and a PottyFailure from [[spoiler: Dylan himself]] after they all [[spoiler: eat jacket potatoes topped with Cuckoo's special sauce that not only contains fish but has been sitting in the garage for two years.]]
* WhatTheFuAreYouDoing: Despite what he may [[SmallNameBigEgo think of them]], Steve's martial arts skills leave a lot to be desired. As Dale demonstrates.
* 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.