New Delhi, May 22 -- Stephen Colbert's long goodbye to late-night TV ends Thursday night when the host of "The Late Show" appears behind his CBS desk for the final time.

What is planned for the finale has not been revealed but the folks at "The Late Show" have had months to prepare for the end of the network's 33-year franchise.

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...