WATCH THIS: SUNDAY

(9 p.m., 10 p.m., 12 a.m., Showtime): In the new episode “Children of the Royal Sun,” Sister Molly (Kerry Bishé) is shocked to discover Josefina (Jessica Garza) is Tiago’s (Daniel Zovatto) sister after Josefina confides in her. Meanwhile, Tiago and Lewis’ (Nathan Lane) investigation leads them to the Vega House. Townsend (Michael Gladis) gets an unwelcome lecture about his personal life. Later, Tiago confronts Mateo (Johnathan Nieves).