The Big Bang Theory's future is still up in the air with none of the main cast signed up for an 11th season – and there's a lot of cash at stake.

The show's boss Steve Molaro recently acknowledged that it's still a  possibility that the show will end after 10 years, or may even continuing without Sheldon, Leonard and Penny.

Jim Parsons, Johnny Galecki, Kaley Cuoco – the actors who play those characters - and their cast-mates are all negotiating new deals. And the amount of money involved is eye-watering.

Parsons, who plays the sitcom's key member Sheldon, makes $1 million per episode, as do Galecki (Leonard) and Cuoco (Penny).

That's the same amount the Friends cast were each making in that show's tenth and final season.

BBT co-stars Kunal Nayyar (Raj) and Simon Helberg (Howard) make $750,000 per episode.

It's not all megabucks though. Melissa Rauch (Bernadette) and Mayim Bialik (Amy) are believed to make around $100,000 an episode. Still great money, but just a tenth of what Sheldon and co earn.