Chitty Chitty Death Bang is episode 03 of family guy season 01. It was originally aired on April 18, 1999.
Lois is furious with Peter when he allows Meg to attend a party the same day as Stewie’s first birthday. Unbeknownst to Meg, she’s actually attending a cult meeting and when Peter brings her back home, the cult leader follows. Stewie recognizes the leader as the man who wants to return him to the “ovarian bastille”.