The episode was written by Steve Callaghan and it was directed by Pete Michels. The episode guest starred Harvey Fierstein, Chace Crawford, Erinn Hayes and Max Burkholder. Recurring voice actors Patrick Warburton, writer Alec Sulkin, episode writer Steve Callaghan, writer John Viener and show creator Seth MacFarlane's sister Rachael MacFarlane made minor appearances. It received mixed reviews from critics.
Brian (Seth MacFarlane) decides to visit his old girlfriend Tracy Flannigan (Harvey Fierstein), who reveals that she has a son named Dylan (Seth Green) and that he is the father. Dylan proves to be quite the unruly teenager and Brian laments to Peter (MacFarlane) and Lois (Alex Borstein) about his experiences with him. Despite his objections, they attempt to convince him that he should take responsibility for his son. At this time, Dylan arrives at the Griffins' house, explaining that Tracy dropped him off for Brian to raise. There he begins tearing the house apart and acts hostile toward everyone, even attacking the Evil Monkey in Chris's closet. He especially acts hostile towards Brian, who decides to take control and kick him out. However, after he attempts to leave with a bag of Brian's cannabis, they discover a shared enjoyment of the drug and the two smoke up and bond. They begin to connect when Brian apologizes for not being there for Dylan when he was born.
Brian quickly shapes Dylan up to be a fine young man, though he himself begins to act a bit self-righteous in his newly discovered role as father. Peter feels very uncomfortable about this, so he decides to convince Tracy to take Dylan back to live with her in the hopes that Brian would go back to normal. While Brian attempts to justify his behavior, Dylan steps up, saying it is time for him to turn his mother's life around just as Brian had done for him. Brian agrees, and the two part ways.
The episode was written by Steve Callaghan, in his second writing credit for the season, as he has written "Lois Kills Stewie" earlier in the season. It was directed by Pete Michels, also on his second working episode of the season (he directed "Padre de Familia" earlier in the season). Series regulars Peter Shin and James Purdun acted as supervising directors for the episode. The episode's music was composed by Walter Murphy. The episode marked the first appearance of Brian's son Dylan, voiced by one of the shows main voice actors, Seth Green.
"The Former Life of Brian", along with the last four episodes of the sixth season and the first eight episodes of the seventh season were released on DVD by 20th Century Fox Home Entertainment in the United States and Canada on June 16, 2009, one month after it had completed broadcast on television. The "Volume 7" DVD release features bonus material including deleted scenes, animatics, and commentaries for every episode.