Channel 5 bosses will be scrutinising viewing figures very closely tonight and keeping their fingers crossed as CSI:Miami airs.
They have been concerned with the eighth series of the US "procedural" since it began screening 16 weeks ago.
Audience figures fell from almost the entire UK population to just a few hundred as changes to the show's format started turning people away.
For example, hero Lt Horatio Caine leaves his sunglasses off more and he looks people square in the eye. But most annoying for fans is that Roger Daltrey's scream of "Yeaaaah" from Won't Get Fooled Again does not always follow immediately after a Caine one-liner before the credits run.
An insider told me: "There is still a good deal of concern surrounding Miami.
"Last week's was a particularly troublesome episode involving a murder during a tourist space flight run by a company out of Miami.
"Well that's science fiction - there are no tourist flights into space yet. We're already up against Sky's Stargate:Universe and Fringe and who knows how Rupert Murdoch might react if he thinks we're treading on his sci-fi toes?
"No. If things don't improve we'll definitely be having another word with Mr Bruckheimer and co. They could find themselves on their last warning."