Life on Mars - Season 1 Episode 12 The Simple Secret of the Note in Us All A modern day cop in a 1973 world.
Overview: The detectives at the 1-2-5 investigate the murder of newspaper journalist Joey Conway. Sam is convinced the killer is the same criminal from a case in 2008. He is motivated by flashbacks to the case, which puts him at odds with his coworkers who think someone else is guilty.