Episode 106, "Silent Partner" Tonight 1|12c AM
SEASON 4, EPISODE 421 - Jack and the team work on the case of a young ice dancer, Kelly McMurphy, who has disappeared. They learn that Kelly's brother, Jason, a hockey player, recently died in a car accident. The siblings' father, Pete, had pushed Jason very hard to succeed, and shortly before his death, it was discovered that Jason had been taking steroids. The squad searches for Kelly, who was very close with Jason.