Big Bang Theory’s Leonard and Amy kiss and now we’re really worried about Sheldon

Somewhere, Sheldon’s mind is exploding — because Leonard and Amy have kissed. And pretty passionately, too.

How on earth did this happen? Well, in 1992 Johnny Galecki made an appearance on 90s US show Blossom alongside Mayim Bialik and the pair shared their first on-screen kiss.

On chat show Conan, The Big Bang Theory co-stars were persuaded to recreate the moment in front of the whole cast… and a huge audience. It was a glorious moment of worlds and decades colliding…