The Letter - S8-E20
Corrected entry: In one of the last scenes, Dr. Lewis is shown leaving the ER, and putting a tack in the bottom of each page of "The Letter." However, at the very end of the episode, "The Letter" is shown blowing in the breeze, without any tacks holding the bottom of the pages down.
Correction: To begin with it was the night before when Dr. Lewis only tacked down two of the three pages, with just ONE pin each. Also, the space below was mostly empty except for a yellow and blue paper. Later the following afternoon, when we see three pages blowing, there is at least one additional posting and a fan is now directly blowing on the bulliten board. People stealing extra tacks for additional postings elsewhere on a bulliten board and loose pins being blown off happen all the time and can easily account for what happened over this long period of time.
OneHappyHusky