‘I’m pregnant, Sheldon,’ Penny reveals, to which Sheldon responds, ‘You’re right, I can’t catch that.’
That brings years of personality conflict to a head, with Leonard thundering, ‘You just found out that a woman you have loved and cared about for 12 years is pregnant and all you can say is you’re relieved she’s not going to get you sick? You are a selfish jerk.’
That seems to bring Sheldon to a belated realisation that life is not all about him, as he dedicates his career defining award to his friends.
‘I have a very long and somewhat self-centred speech, but I’d like to set it aside,’ the character says during Nobel Prize acceptance speech. ‘This honour doesn’t just belong to me. I wouldn’t be up here if it weren’t some very important people in my life.
‘My other family who I’m so happy to have here with us … is that Buffy the Vampire Slayer?”
Mega spoilers: Yes, Sarah Michelle Gellar does appear.
Continues Sheldon: ‘I have been encouraged, sustained, inspired, and tolerated not only by my wife, but by the greater group of friends anyone ever had.
‘I apologise if I haven’t been the friend you deserve but I want you to know, in my way, I love you all.’
And with that, we wait for a ten-year gap before the show inevitably comes back for a reboot.