The longest-running sci-fi series in history, Doctor Who is a must watch for fans of sci-fi adventures mixed with a healthy dose of emotional, character-driven drama. Spanning several decades and a constantly rotating cast, the core of the series always stays the same: an alien being called the Doctor who can regenerate into a new body at the end of one life, travels the universe, and tries to help people while picking up humans (and occasionally aliens) to join the adventure, with often funny and sometimes heartbreaking results.
Where to watch: Amazon Prime, iTunes