Where can you watch an ominous stranger reveal news of a fake pregnancy to a dedicated father? An insanely trippy teenage rave? A mysteriously decapitated alpaca? A beloved missing mother? Secrets that unravel, destroying families and the whole community in the process? The answer is in the new Netflix original series “The Stranger.” Released on Thursday, Jan. 30, “The Stranger” is based on the book by renowned American mystery novelist Harlan Coben.