Kim Jaejoong (Protect the Boss) has been cast in the upcoming time-travel-medical-historical drama Time Slip Dr. Jin starring Song Seung-heon, in what will be the singer-actor’s first sageuk role to date. The manga adaptation features a Doogie-esque hero who travels back in time 150 years, where he learns that maybe there’s more to being a doctor than a massive IQ. Because apparently that’s not something you can learn after 1860. But… how will we know he’s a TV doctor if he’s not wearing the shiny white labcoat and model-strutting down the hall with two rows of interns at his sides? Read more on Dramabeans.