Unforgettable

A medical examiner, who was suspected of murdering his wife, is trying an experimental drug to retrieve his wife's and others' memory and maybe find the killer and the mass murderer in a related present case.
Seattle medical examiner David Krane is obsessed with solving his wife's murder. A possible solution presents itself in an experimental "memory" serum designed by a neurobiology professor, which has the ability to transfer memories from one person to another, but with potentially fatal consequences.