In the Halloween episode of "Pretty Little Liars," Aria, Emily, Hanna and Spencer crash the Ravenswood Founders Day Celebration after finding a clue that Ali may indeed be alive. Which leads directly to the premiere of "Ravenswood," in which Caleb tries to unravel the town's supernatural secrets.
Watch • "Pretty Little Liars," 9 p.m. Wednesday; "Ravenswood," 10 p.m. Wednesday, ABC Family
Julie Andrews, Audra McDonald, Don Henley, Josh Groban and Michael Bublé are among those saluting the series' 40th anniversary.
Watch • 8 p.m. Friday, PBS/Channel 7