Based on the popular Dark Horse comics series by co-creators Peter Hogan and Steve Parkhouse, "Resident Alien" is a twisted and comedic fish-out-of-water story that follows a crash-landed alien named Harry (Alan Tudyk) who, after taking on the identity of a small-town Colorado doctor, slowly begins to wrestle with the moral dilemma of his secret mission on Earth—ultimately asking the question, "Are human beings worth saving?".