The Big Bang Theory star Simon Helberg has said the show feels stronger than ever, as the sixth series ended on US screens.
The 32-year-old, who plays aerospace engineer Howard Wolowitz in the comedy series, sees a long life for the programme, which airs on Channel 4 in the UK.
"I think we're all having a good time. And I think the show is far from being stale. It is kind of constantly - not reinventing itself - but just expanding on these characters. So, yeah, I think we're going strong for now, as long as people keep inviting us in," the actor said.
The Big Bang Theory, which also stars Johnny Galecki, Jim Parsons and Kunal Nayyar as science geeks, has more than doubled its debut-audience in the US in its six series, delivering its most-watched first-run episode ever this year, with more than 20 million tuning in.
"Howard finds Stephen Hawking's crew is sending out an expedition to the North Sea, and he gets Leonard a job, going on a boat for four months. The obstacle is Penny and Leonard have never been better. So, is he really going to leave her for four months?" Simon teased.
Simon - who has a one-year-old daughter with actress-wife Jocelyn Towne - revealed there is also rivalry between best buddies Howard and Raj (Kunal).
"Howard's a little competitive now that Leonard is getting the spotlight, (because) no one cared about Howard being an astronaut. So, it creates this sort of ripple effect," he added.
The series six finale will be shown on UK screens later this year.