"TV This Week: New Spinoffs, Pet Galas, and Final Seasons"

This week brings a slew of new TV premieres and finales, including the live-action adaptation of "Avatar: The Last Airbender" on Netflix, the return of "The Walking Dead" with a spinoff featuring Rick and Michonne, a new animated sci-fi comedy "The Second Best Hospital in the Galaxy" on Prime Video, and twisty sci-fi series "Constellation" on Apple TV Plus. AMC Plus also debuts "The Walking Dead: The Ones Who Live," marking the long-awaited return of Rick and Michonne in an "epic love story" amidst a zombie-filled world.