The Big Bang Theory

One of those don’t-miss episodes where the cute scenes put you in the mood to laugh even more at the funny stuff. When Penny finds her old ballgown, it encourages the girls to organise a prom on the roof. Reminiscing about school sparks one of those wrenchingly sad stories from Amy – plus the customary weirdness from Sheldon. And Raj has wanted to attend a prom since watching Pretty in Pink, “… but then I saw Carrie.”

The boys don tuxes – even Stuart with his new date, who turns out to be Howard’s second cousin – Emily shows off her tattoo, and Penny and Leonard look affectingly sweet together. But tonight will be remembered for a breakthrough from Sheldon – and no amount of backtracking can undo it. Be there.

This is the last new episode for a few weeks, as Big Bang goes on a mid-season mini-break. Gah!