Pilot episode of the comedy about scientists and their friendship with a down-to-earth neighbour. When aspiring actress Penny moves into Leonard's apartment block, he is immediately smitten, but Sheldon warns him that he runs the risk of a broken heart if he tries to woo her. Johnny Galecki, Jim Parsons and Kaley Cuoco star

Sheldon helps Leonard drop off a parcel for Penny, but when he sees how messy her flat is, he tries to do a good deed - which is not well received. Johnny Gale, Jim Parsons and Kaley Cuoco star

Leonard is upset to learn Penny is dating someone, so his friends encourage him to seek a new romance by asking another woman out. Sara Gilbert appears alongside her Rosen co-star Johnny Gale

Sheldon is fired for being disrespectful to his boss, and explores new activities in a bid to find a purpose in life other than physics, but Leonard takes drastic action to restore him to his old self. Laurie Metcalf guest stars as Sheldon's mother

Leonard fears he is wasting his time with Penny and ends up spending the night with fellow scientist Leslie. However, he is disappointed when she later tells him she was only interested in a one-night stand. Meanwhile, Sheldon frets over a change to his hamburger routine. Starring Johnny Galecki, Kaley Cuoco and Jim Parsons

Penny hosts a Halloween costume party, which proves a worthy test for the boys' social skills. During the event, Leonard has a run-in with Penny's ex-boyfriend. Kaley Cuoco, Johnny Galecki and Simon Helberg star

The extreme sports-loving super spy is brought out of exile when a lethal gang of mercenaries steal a powerful new weapon that threatens the safety of the entire world. He must assemble his own team of adrenaline junkie agents to recover the lethal device. Action thriller, starring Vin Diesel, Donnie Yen, Toni Collette and Samuel L Jackson

Firefighter and passionate cyclist Dave is concerned about a pilar cyst on his head that prevents him from wearing helmets.