NPC's are almost never created unless needed. If it's just someone they meet for one episode, they get a name and a quick personality. If the NPC will stick around awhile, probably a few lines and some stats; it will grow as needed. Creating an episode for a Champions session takes about 2-3 days and is usually 3-4 pages; a detailed intricate episode may be 6 pages, most of it description. That kind of episode will probably start before the week to be used, giving time for me to think it through. About 20% of my episodes I create a video to go with it, hinting at the episode; those last 1-3 minutes. Also, as needed, I gather pictures to visually help the episode, particularly if the episode is outside the U.S.A. such as Paris.