In the US there's been a messy scuffle over which highly-paid talk show host gets the plum 11.30pm slot - a time that hardly registers in the UK. O'Brien hosts his last episode on Friday, and Leno returns on 1 March.
So is late night television more important in the US? Leno left the flagship talk show last autumn to dip his toes in the waters of prime time.
The late-night talk show has been a staple of American programming for the best part of half a century, and a jewel in the crown of the networks.
The Tonight Show and its rival The Late Show with David Letterman together pull in more than nine million viewers.
This is a tiny minority in a population of about 308 million, but nonetheless important as most are aged between 18 and 49 - a key audience for advertisers.
He began investigating the £400 LG device after noticing that its home screen appeared to be showing him ‘targeted’ adverts — for cars, and Knorr stock cubes — based on programmes he’d just been watching.
Huntley decided to monitor information that the so-called smart TV — which connects to the internet — was sending and receiving.
Weiss adds that it’s like any addiction, and the addict increasingly “needs to have this intensity-based experience."However, the idea that sex is clinically addictive remains controversial.