"Valerie on the Stairs" (10 p.m., Showtime): The "Masters of Horror" anthology series continues with "Valerie on the Stairs." It's an adaptation of a Clive Barker story about a writer (Tyron Leitso)

"Valerie on the Stairs" (10 p.m., Showtime): The "Masters of Horror" anthology series continues with "Valerie on the Stairs." It's an adaptation of a Clive Barker story about a writer (Tyron Leitso) who is visited by a beautiful, but strange apparition. Is it the muse he has always searched for -- or the manifestation of a much darker force? Christopher Lloyd also stars.