Best series opener?

I mean best first episode.

Watching series 5 again and it was on point for many of them. Aisling complained about sexual harasment then harassed Alex as a robot and showed her knicker on the next task. Mark got his heron comment. Nish being a legend, and also "annoyed Greg already" at the prize task, foreshadowing his abysmal score. Lady Sally showed her madness on her very first filmed task.

I'm sure it's probably still not the best, so which one? Non-UK series as well.