The Big Bang Theory
Series 5 Episode 16

Sheldon helps Amy in her biology lab after he is forced to use up two weeks of holiday, but he is bored by the tasks she gives him

The Skank Reflex Analysis: Penny worries that she's screwed things up with her friends after her night with Raj

First shown: Thu 3 Nov 2011 | 21 mins

The Infestation Hypothesis: A battle of wills between Sheldon and Penny leaves Amy in the middle

First shown: Thu 10 Nov 2011 | 19 mins

The Pulled Groin Extrapolation: Leonard goes as Amy's date to a colleague's wedding

First shown: Thu 10 Nov 2011 | 19 mins

The Wiggly Finger Catalyst: Raj is upset that he's not in a relationship, so Penny tries to find him the perfect date

First shown: Thu 17 Nov 2011 | 19 mins

The Russian Rocket Reaction: Sheldon's old nemesis Wil Wheaton returns and invites everyone to a house-warming party

First shown: Thu 24 Nov 2011 | 21 mins

The Rhinitis Revelation: Sheldon's mum becomes a firm favourite with his friends - much to Sheldon's annoyance

First shown: Thu 1 Dec 2011 | 21 mins

The Good Guy Fluctuation: The gang play Halloween pranks on Sheldon. Leonard questions his feelings for Priya.

First shown: Thu 8 Dec 2011 | 19 mins

The Isolation Permutation: Amy learns that Penny and Bernadette have been shopping for bridesmaids gowns without her

First shown: Thu 15 Dec 2011 | 20 mins

The Ornithophobia Diffusion: Leonard and Penny attempt to hang out without anybody else around

First shown: Thu 22 Dec 2011 | 20 mins

The Flaming Spittoon Acquisition: Stuart from the comic book shop asks Amy out, so Sheldon asks her to be his girlfriend

First shown: Thu 29 Dec 2011 | 20 mins