BEST BETS ON TV

“Legacies” (9 p.m., THE CW): For the last decade, the heroes and villains of “The Vampire Diaries” and “The Originals” have captivated audiences. They left a legacy of love and family in their wake, which continues in “Legacies,” a new drama that tells the story of the next generation of supernatural beings at The Salvatore School for the Young and Gifted. The series premieres tonight.

“How to Get Away with Murder” (10 p.m., ABC): Annalise and Gabriel work tirelessly to convince a jury to grant an insanity plea in Nate Sr.’s murder retrial

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