divMichael accidentally runs over Meridith in the parking lot, and his guilt causes him to organize a 5-K run for her. Dwight and Angela have a falling-out after he kills her cat, and the Jim and Pams relationship is discovered.  div divSeason 4, Episode 2: Dunder Mifflin Infinity  div divOriginal Air Date—4 October 2007  div divMichael feels threatened when Ryan returns to the Scranton office to share his ideas about the future of Dunder Mifflin. Jim and Pams relationship is shared with the entire office, while Angela and Dwights relationship is on the rocks.  div