LOS ANGELES — Late night TV host Conan O’Brien all but tacked up a farewell banner on this week’s “Tonight” shows, even as his exit deal with NBC remained under discussion.

O’Brien’s guest lineup for Thursday and Friday had the ring of finality, with several big names, including actor Robin Williams and singer Barry Manilow on Thursday.

Tom Hanks was scheduled for Friday, as was Will Ferrell, who was the first guest O’Brien welcomed when he started last June as “Tonight” host.

O’Brien, whose show was scheduled to be in reruns next week, also joked in a monologue about looking forward to history’s biggest drinking binge in a few days.