Late World's theme song was Frank Black's "Los Angeles", a nod to the studio's location.
The show began with a monologue, like many late night talk shows, but with Galifianakis' unique style, usually involving a piano and non-sequiturs interlaced with topical humor.
One of the running skits was footage of red carpet interviews, edited later with Zach asking humorously different questions.
The show was canceled after nine weeks of production due to poor ratings.
A then-unknown Kevin Federline had a small, non-speaking role in one of the show's last episodes.