“Mary Poppins Returns: BEHIND THE MAGIC” (8 P.M., ABC): a special edition of

“Mary Poppins Returns: BEHIND THE MAGIC” (8 P.M., ABC): a special edition of “20/20” gives viewers an inside look at “Mary Poppins Returns,” the sequel to the classic 1964 film starring Julie Andrews and Dick Van Dyke. In the special, ABC News’ Chris Connelly sits down for the first prime-time television interviews with Emily Blunt and Lin-Manuel Miranda, stars of the sequel.

“Meghan’s New Life: THE REAL PRINCESS DIARIES” (9 P.M., ABC): ABC News takes an up-close look at Meghan Markle’s royal beginnings as the Duchess of Sussex in a prime-time special.

TV listings, D3