A King-sized miniseries that features a clown named Pennywise highlights our list of what to watch this week, along with Ethan Hawke’s star turn as a Broadway legend and a Kelly Reichardt art heist movie, “The Mastermind.”

Here is our roundup.

“It: Welcome to Derry”: HBO’s long-gestating prequel to “It” and “It Chapter Two,” based on Stephen King’s mammoth 1986 novel, makes for ideal Halloween viewing. The eight-part series (five episodes of which were made available for review) inflicts a serious case of the heebie-jeebies and is generally good, despite a couple of glitches, and expands upon King’s bloody commentary about the power and nature of fear and how it can cripple and manifest into something supremely evil.

Developed by “It” filmmaking alums Andy Muschietti and Barbara Muschie

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