Conan (11 p.m., TBS) — Gregg Allman; comic Bill Maher.

Late Show With David Letterman (11:35 p.m., CBS3) — Journalist Brian Williams; El-P performs.

The Tonight Show With Jay Leno (11:35 p.m., NBC10) — Comic Wanda Sykes; actor David Hasselhoff; Santana performs.

Jimmy Kimmel Live (Midnight, 6ABC) — Johnny Depp; Casey Wilson; Silversun Pickups perform.