Conversation so far:
How does Season 1 of the show Gossip Girl start off for Chuck Bass?
In the pilot episode, Chuck Bass attempts to rape both Serena van der Woodsen and Jenny Humphrey.
Who are Serena van der Woodsen and Jenny Humphrey in the show Gossip Girl?

Question: Did he succeed after attempting to rape them?
Self-contained rewrite: Did Chuck Bass succeed after attempting to rape Serena van der Woodsen and Jenny Humphrey?