I haven't finished watching Supernatural, so I'd like people to suggest episodes to me. So far I can suggest:
Supernatural: Season 1 episode 1, Season 1 episode 16
Stargate Atlantis: Duet, The Return 1
Gakuen Heaven: episode 8
Ouran High School Host Club: episode 1, episode 20
Please put in your suggestions!!
PS: The titles that are in tied will be chosen further depending on other factors (time suitability, episode suggestions, a reasonably good source, etc.)