TV Guide TLC Sunday

The prodigy uses his new friendship with school bully Tommy Clarkson to boss Georgie around. Missy steals Meemaw's make-up to wear when her photograph is taken on school picture day

The young genius and Dr Sturgis fall out for the first time when Dr Sturgis marks a question as wrong on Sheldon's test paper. Meanwhile, Mary takes over Pastor Jeff's duties when he's off sick

Buying goods from the comfort of home

Buying goods from the comfort of home

The youngster boycotts his favourite bread company when the taste of his favourite loaf changes, but matters soon get out of control. Meanwhile, Georgie tries to console Veronica after breaking up with her boyfriend

The youngster becomes inspired by his hero Albert Einstein and tries to play the violin. Mary thinks that she may be pregnant and goes to buy a pregnancy test with Meemaw

The young genius moves in with Dr Sturgis for a night to see what it would be like to leave home and go to college. During his absence, a lonely Mary tries to bond with other members of the family

Sheldon refuses to get his hair cut as his regular barber is in a coma - a solitary change that causes chaos in the rest of his well-ordered life. Meanwhile, Howard undergoes a gruelling Nasa training programme in Houston, Texas, meaning he can only communicate with Bernadette via the internet

Amy is disappointed with Sheldon when he announces he is breaking his promise to go with her to a birthday party in favour of joining the boys for a Star Wars video-game marathon. Comedy, starring Mayim Bialik and Jim Parsons

Penny buys Leonard and Sheldon some Star Trek action figures, but the duo refuse to remove them from the packaging in case their value is diminished. Elsewhere, Raj is desperate to find someone to accompany him to a wedding and asks his parents to find him a date. Featuring the guest voice of Leonard Nimoy

Howard is put in charge of looking after Stephen Hawking's wheelchair when the famous scientist comes to lecture at the university for a week - and takes advantage of his position to blackmail Sheldon into performing assorted unpleasant tasks. Guest starring Stephen Hawking

Leonard, Sheldon and Raj organise a stag party for Howard, but stories about his sexual history are unwittingly revealed, and he has to persuade bride-to-be Bernadette not to call off the wedding. Comedy, starring Simon Helberg and Kunal Nayyar

Howard tries to use his wedding as an excuse to avoid being sent into space, but ends up accepting the mission. Amy plots to get Sheldon to take the next step in their relationship, while Leonard accidentally asks Penny to marry him

As Howard and his fellow astronauts sit in the space shuttle awaiting launch, he reflects on the tumultuous events of the previous few days, when he and Bernadette tried to get married. Meanwhile, his friends witness the blast-off on TV at home

Despite being on the International Space Station, Howard gets caught in a strange argument between Bernadette and his mother via video link. Elsewhere, Raj feels lonely while his best friend is away and ends up interfering with Sheldon's and Leonard's dates. Comedy, starring Simon Helberg

Penny tells the girls she is unsure about her relationship with Leonard and is considering breaking up with him, but when Sheldon finds out, he tries his best to change her mind. Meanwhile, on the International Space Station, Howard is being bullied by the other astronauts. Comedy, starring Johnny Galecki, Jim Parsons and Kaley Cuoco

Sheldon hires an attractive female assistant, but when she becomes interested in Leonard, Penny decides to mark her territory by sleeping with him. Meanwhile, Howard starts to lose his mind when his return from space is delayed another week. Comedy, starring Jim Parsons

Howard returns from his space mission, but the welcome from his friends and family does not meet his expectations. His night alone with Bernadette goes badly, his mother ignores him, and he realises Stuart has taken his place as Raj's best friend. On top of that, Sheldon, Amy, Leonard and Penny kick him out of their group games night. Comedy, starring Simon Helberg

Stuart hosts a Halloween party at the comic-book store, and Howard talks incessantly about his work on board the International Space Station, annoying his wife and friends. Penny and Leonard have a steamy encounter at the lab. Guest starring real-life astronaut Buzz Aldrin

Sheldon upsets guest star Stephen Hawking when they play an online game of Words with Friends, until Howard advises him to let the scientist win. Elsewhere, Penny enrols in a college class, but decides to keep it a secret from Leonard. Comedy, starring Jim Parsons and Simon Helberg

When Amy and Wil Wheaton get into a fight while filming Fun with Flags, Sheldon suffers the consequences of their fall-out. He ends up going to Penny for advice and after getting drunk, confronts the actor in a bid to make him apologise. Bernadette encourages Howard to move out of his mother's house

The friends try to solve the mystery of Sheldon's post-lunch activities, following him to a secret room where they discover how he chills out. Elsewhere, Leonard is jealous when Penny starts texting a classmate, but things quickly change when Alex gets flirty with him

Sheldon feels undermined when his parking space at the university is allocated to Howard instead, and his determination to cling on to the spot causes a rift in the pair's friendship. However, the battle between the boys pales in comparison to that waged by Amy and Bernadette, whose disagreement on behalf of their significant others becomes increasingly personal. Comedy, starring Jim Parsons and Simon Helberg

The young genius invites the entire school to a party for the Nobel Prize announcements. Meemaw learns more about Dr Sturgis's past and Georgie's desire for cable TV leads to a stand-off between him and George Sr