The consulting criminal shoots himself in the head, causing the army doctor to watch the consulting detective jump off a building. The detective somehow lives but doesn't tell anyone for another three years.
The funny thing is Mary said this to john in the empty hearse. John-"I don't shave for Sherlock Holmes" Mary-" you Gould put that on a t-shirt" coincidence or a catch phrase Mary first heard somewhere else?
The thing that most american sherlockians don't realize is, in England "trousers" are "pants", and "pants" are "underwear". John isn't talking about Sherlock's pants he's talking about his underwear. One of my favorite scenes.