Viewers found out that Pam was pregnant in the season five finale titled "Company Picnic".
The Convention! Season 3 Episode 2!
In season five, in the episode entitled Stress Relief.
Season 3 Cocktails
Season 3, Episode 18: The Negotiation.
That occurs in the very first episode of The Office in Season 1.
Episode "Frame Toby" from Season 5
During Season 5, Pam goes to art school in New York. She returns to the Dunder Mifflin office in Episode 8.
season 3 episode 13 half way through the episode
Season 6, Episode 23, called "Body Language."
gossip is the first episode. Michael finds out that Stanley is cheating on his wife teri. he tells everyone in the office but then regrets it and so he tells everyone lies about every person in the office. he says that pam is pregnant which is actually true. everyone tries to find out what the 1 true rumor is and Jim and pam confess..
Weight Loss. Season 5, Episode 1.