Tinder Box - S1-E22
Trivia: Because the episode 'Tinder Box' closely resembled (and was likely based on) the fire at a nightclub in Rhode Island that killed 100 people, the local CBS affiliate decided not to air the episode so soon after the event.
Deep Freeze - S6-E5
Trivia: One the episode's murder suspects is played by a then-relatively unknown Stana Katic. Two years later, she began playing the opposite side of the law, homicide detective Kate Beckett, on Castle, the role for which she has since become most famous.
Trivia: Kelly Carlson plays Johnny Pacar's mother in the episode, even though in real life she's only five years older than him.
Trivia: Because of the October 2002 DC-area sniper killings, CBS considered delaying the broadcast of the episode "Kill Zone", in which Horatio pursues a sniper. However, when two suspects were arrested and charged with the sniper slayings at the end of October, the network reconsidered, and chose to air the episode during the November 2002 sweeps as originally planned.