48 Hours Mystery Season 10 Episode 39 online free. Watch the newest episode of 48 Hours Mystery season 10 online free. The new episode of 48 Hours Mystery season 10 is entitled the “Diary of Showgirl “. 48 Hours Mystery season 10 episode 39 will be shown on Saturday July 31, 2010 10:00 pm WCBS (CBS) ch 380. This episode for sure is a mysterious one.Online free.