The West Wing - In Excelsis Deo -- The president's chief speech writer is called by Metro DC police in connection with a homeless man who died of hypothermia while sleeping in a park. Of course he's not involved, but his business card is in the man's coat--he donated his coat to good will the year before and it wound up on this man. Of course he doesn't know the man at all, and has nothing to do with him, but decides to make himself involved anyway. He asks about the man at a nearby souvenir shop and finds out that the man was a Vietnam Veteran. He later discovers the man's brother, also homeless and mentally disabled. Knowing that Veterans are entitled to a military funeral, Toby arranges everything (we see the funeral above). The B and C plots in the episode are also very nice but pale compared to this. The best moment is when Toby takes money out of his wallet to try to give something to the homeless men he talks to, looks at it, and then hands them a wad of what has to be several hundred dollars. The men point out to him "It's cold, you'll need money for the bus"--they don't even realize that Toby is a wealthy man and that not everyone is in as dire straights as them.
(This episode was part of the show's Emmy Submission--Richard Schiff, who plays Toby won. Aaron Sorkin and his co-writer also won for Best Writing)