For more detailed cast and production info, you can check the episode's IMDb page or Rotten Tomatoes summary. New York: Season 3, Episode 21 - CSI - Rotten Tomatoes
Danny and Hawkes investigate the death of Scott Colson at Coney Island. They discover a woman dressed as a cowgirl who used an air gun to inject Scott with a lethal substance, eventually linking the crime to Scott's brother, Jesse.
While not titled "Past Imperfect," this specific season and episode number features the crew meeting their own descendants from a divergent past.
Stella Bonasera receives her HIV test results, which come back negative. Other Possible "Past Imperfect" Guides
In this episode, Mac Taylor pursues a serial killer whose conviction is overturned after the arresting officer is jailed.
Detectives Briscoe and Curtis investigate the murder of a former cover girl with hidden secrets.
A woman named Emma is found in a dumpster with her head wrapped in packing tape and her eyelids removed. This M.O. matches Clay Dobson, a serial killer recently released on a technicality.
Xena has flashes of her past life with Borias while trying to protect a village from an army.