Stephen Colbert is saying goodbye to 'The Late Show.' How it ends is still a secret

Guests in the final week have included Michael Keaton, Jon Stewart, Julia Louis-Dreyfus, Steven Spielberg, David Byrne and Bruce Springsteen, while there's been a wacky version of “It’s Raining Men” remade into “It’s Raining Fish.”

CBS announced last summer that Colbert’s show would end, citing economic reasons after 11 seasons. But Colbert is the ratings leader in late-night TV. Many — including Colbert — have expressed skepticism that President Donald Trump’s repeated criticism of the show wasn't a factor.

The decision to shutter the show came after parent company Paramount’s $16 million settlement of Trump’s lawsuit over a “60 Minutes” interview as Paramount awaited his administration's approval of a pending sale to Skydance Media. Colbert had called it a “big fat bribe.”

Dustin Kidd, a professor of sociology at Temple University, notes that Colbert leaves at the top of his game and as the ratings leader on late night. Canceling him can’t be explained strictly through economics, he said.

“I would argue that it’s answerable, frankly, through politics,” Kidd said. “There’s been a lot of political pressure levied against this show and a lot of political pressure at work within CBS more generally. And I think that has a lot more to offer in terms of explaining why this show, at this time.”

Colbert’s chief rivals, ABC’s “Jimmy Kimmel Live!” and NBC’s “The Tonight Show with Jimmy Fallon,” will both run reruns on Thursday night at the same time as Colbert's goodbye.

CBS will fill “The Late Show” slot with “Comics Unleashed,” in which comedians share stories. Host Byron Allen has vowed to avoid politics.