Stephen Colbert concludes his eleven-year tenure as host of The Late Show with an extended series finale airing tonight on CBS.The network announced that the program will be replaced by a comedy panel show titled Comics Unleashed hosted by Byron Allen.Paramount Global officials claim the decision is purely financial despite speculation that Colbert's sharp criticism of Donald Trump influenced the move.Celebrity guests including Barack Obama and David Letterman join the host for his final broadcast from the historic Ed Sullivan Theater.