Final answer:
Erin from 'The Office' starts dating Pete after Andy leaves on the boat, which unfolds during Season 9 of the show.
Step-by-step explanation:
After Andy leaves on the boat, Erin from The Office eventually begins to date Pete. This relationship unfolds in the latter part of Season 9, after Andy sails to the Bahamas to care for his family's boat and ultimately loses contact with the office for several weeks. Erin and Pete's relationship develops as they work closely together in the office and share common interests, leading to a more compatible partnership than what Erin shared with Andy.