Resident Alien (season 1)

Harry, an alien, crash lands on Earth and passes himself off as a small-town human doctor. Arriving with a secret mission, Harry starts off living a simple life... but things get a bit rocky when he's roped into solving a local murder and realizes he needs to assimilate into his new world. As he does so, he begins to wrestle with the moral dilemma of his mission and asking the big life questions like: Are human beings worth saving? and Why do they fold their pizza before eating it?