“Welcome to Dunder Mifflin: The Ultimate Oral History of The Office” reveals that there was almost an irredeemable rift between leading lovebirds Jim Halpert (John Krasinski) and Pam Beesly (Jenna Fischer).It was originally scripted that Jim was going to “make out” with Pam’s replacement Cathy Simms (Lindsey Broad) in the Season Eight episode “After Hours,” when the two found themselves together in a Florida hotel room while Pam was home on maternity leave.But the big tuna let out a resounding