The request "[S3E1] 301" most commonly refers to the third season premiere of the supernatural drama series Haven , or The Affair , where it is also the title of the season three opener. Alternatively, "301" is frequently used as shorthand for Season 3, Episode 1 in many TV databases for shows like The Walking Dead (episode title: "Seed") or Black Mirror ("Nosedive"). Haven (S3E1): "301"
This episode emphasizes the value of communication as a tool for resolution.
The title refers to a major reveal occurring approximately five minutes before the end of the episode.