Zach Galifianakis was Jimmy Kimmel’s first guest back Monday after paternity leave from Jimmy Kimmel Live.

We quickly learned that Galifianakis had prepared as if he were guest hosting for Kimmel. Sure they joked about it in the opening segment. But Galifianakis had done his homework, as we also saw in multiple segments where the comedian and star of FX’s Baskets interviewed Kimmel’s co-executive producer, Jason Schrift, as well as “Cousin Sal,” to take notes and fill his expected hour.

Roll the clips!

Galifianakis spent his first Los Angeles days at the Hollywood Youth Hostel down the street from where JKL tapes. Oh, memories.

Galifianakis also joked sincerely about how his own young son already knew what was up with Trump before the election…