Season 1: Episode 4: Discovery (Carnal Knowledge)
Dawson is surprised to find scandalous footage of Ms. Jacobs and an unidentified man making love outdoors, after he accidentally leaves his camera on location, and running, overnight. Panicked, Pacey reveals to Dawson that the tryst is between he and Ms. Jacobs. Meanwhile, on the eve of Dawson's parents' 20th anniversary, Dawson discovers that his mother has been having an affair with her co-anchor and Joey has known about it. Hurt and confused, Dawson wants desperately to tell his father. To further confuse matters, Jen reveals that she had been leading life in the fast lane in New York, which is why her parents sent her away. Completely put off, Dawson doesn't know how to respond to the fact that Jen is not a virgin.