Conversation so far:
when does riverdale come out on american netflix
The fourth season will be released on Netflix on October 9, 2019
what is the show riverdale based on?
Riverdale is based on characters by Archie Comics.
what network does the show riverdale run on?
Riverdale runs on the CW network.

Question: when did the show first air?
Self-contained rewrite: when did the show riverdale first air?