Sex-crazed, aggressive stalker by night. Gentle, law-abiding lifesaver by day.
Welcome to Do No Harm, a modern-day twist on Dr Jekyll and Mr Hyde.
This medical drama - the title coming from the Hippocratic Oath - revolves around a superstar neurosurgeon Jason Cole (played by Steven Pasquale).
Now, this Dr J is Mr Perfect, an all-round nice guy (yawn), except for the problem of having an alternate personality - the scientific term is "dissociative identity disorder".
Between 8.25pm and 8.25am, Ian Price takes over his body.
Aside from being bizarrely punctual, Ian is devil-may-care with a screw-the-rules attitude.
He dabbles in drugs and has some seriously creepy tendencies.
No explanation is given as to why this happens or why it's so time-specific.
All we know is that Jason has suppressed Ian for a number of years by sedating himself for 12 hours a day.
But now Ian has become immune and is free to enjoy himself on Cole's behalf.
The show is pro-Jason. You're meant to worry that the secret of why he can't operate at night will be exposed.
But it's a shining example of why nice guys finish last - Jason is b-o-r-i-n-g.
Ian may not be lovable, but he's definitely more relatable.
Who wouldn't rebel when held up against the gold standard of Jason Cole?