Perfect Chemistry

October's Books on Screen roundup includes the films The Woman in Cabin 10 on Netflix and Regretting You in theaters; the series premieres of HBO's "IT: Welcome to Derry" and Apple TV+'s "Down Cemetery Road"; the season premieres of "Tracker" and "Watson" on CBS; the season finales of USA Network's "The Rainmaker," STARZ's "Outlander: Blood of My Blood," AMC's "The Walking Dead: Daryl Dixon" and Apple TV+'s "Slow Horses"; the continuation of "The Morning Show" on Apple TV+; and the DVD/Blu-ray releases of She Rides Shotgun, I Know What You Did Last Summer and The Best Christmas Pageant Ever.