Continuity mistake: When Bill Crouse is in his home, near the end of the episode, he pours himself a glass of whiskey. He looks out of the window and see Jen's 'ghost', then screams and falls to the floor. As he's crawling backwards, he's no longer holding the glass of whiskey - and you don't hear it drop or smash.
Continuity mistake: Bill Crouse is sitting at a desk talking to his colleague about Jen. The first two shots show him sitting back on the chair with his legs up on the desk. The next shot, he has instantly moved to sitting normally with his legs down and leaning forward.