when does jim come back on the office
Jim Halpert In "The Merger", Jim's and Pam's reunion is awkward. Pam is overjoyed, but Jim is clearly uncomfortable. He lets Pam know that he is seeing someone, and gradually Karen is introduced as his girlfriend. As Jim settles back in at Scranton, he uses his promotion as an excuse to avoid his old interactions and pranks with Pam, claiming that pulling pranks is not appropriate for his position. However, in time, Jim does return to his old ways, especially targeting Andy Bernard, a Stamford transfer, and Dwight.
Stress Relief (The Office) In this episode, Dwight stages a fire in the office to test the office's fire safety skills, but things go from bad to worse when Stanley suffers a heart attack, causing Michael to come up with ways to relieve stress in the office, including a comedic roast of himself. Meanwhile, Andy, Jim, and Pam watch an illegally downloaded movie at work starring Jack Black, Jessica Alba and Cloris Leachman, and Pam deals with her parents' recent argument that's caused her father to move in with her and Jim.