Four episodes into "The Pitt" Season 2, audiences are finally learning what became of Dr. Heather Collins. TVLine was first to report that Tracy Ifeachor would not return to the Emmy-winning medical drama for Season 2, leaving Collins' fate unresolved after her final appearance in Episode 11. After Robby assured her he wasn't upset, he gave Collins permission to clock out an hour early. That brings us to Season 2, Episode 4, in which frequent flyer Louie asks about Collins' whereabouts. "Dr. Collins finished her residency, took up a job in Portland as an attending physician...