matt richenthal of "tv fanatic" rated the episode with 4.2/5. "while "let the right one in" didn't delve much into the show's mythology, it held nothing back when it came to blood, gore and violence. [...] from stefan getting tortured like jack bauer, to multiple stake stabbings and blood sucking, this episode was filled with the sort of fare not typically scene on television at 8 p.m."