what is the theme of the sixth season?
It depicts the everyday lives of office employees in the Scranton, Pennsylvania, branch of the fictional Dunder Mifflin Paper Company. In the episode, Michael spreads a rumor about Stanley having an affair, then spreads a series of false rumors to try to convince everyone the original rumor was not true.
Gossip (The Office)
The series—presented as if it were a real documentary—depicts the everyday lives of office employees in the Scranton, Pennsylvania, branch of the fictional Dunder Mifflin Paper Company. In the episode, Michael spreads a rumor about Stanley having an affair, then spreads a series of false rumors to try to convince everyone the original rumor was not true. The rumors cause Andy to question his sexuality, and Pam and Jim to debate whether or not to tell the office that Pam is pregnant.

what is "gossip"? It is the sixth season premiere of the American comedy television series "The Office", and the 101st overall episode of the series. when did this series begin? March 24, 2005
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Gossip (The Office) [SEP] Introduction
The rumors cause Andy to question his sexuality, and Pam and Jim to debate whether or not to tell the office that Pam is pregnant. "Gossip" confirmed the fact that protagonist Pam was pregnant, which was strongly hinted in the fifth season finale, "Company Picnic". "Gossip" was the first episode to feature Ellie Kemper as a regular cast member, and the first "Office" episode since Ed Helms achieved box office success with the summer comedy film, "The Hangover". "Gossip" received generally positive reviews, with several commentators particularly praising the subplot in which Andy questions whether the rumor about him being gay might actually be true.