TONIGHT on WGCU-HDTV (Sunday, June 21) 7 p.m. - Father Brown: The Celestial 8 p.m. - Lucy Worsley's Royal Myths and Secret - Elizabeth I: The Warrior Queen #WATCH: Join Lucy Worsley for an exploration of how Elizabeth I's image as a warrior queen, created by a series of myths and secrets about her victory over the Spanish Armada, shaped British national identity for centuries. Tune in or stream Sun, Jun 21 at 8/7c. 9 p.m. - Grantchester Season 5 on Masterpiece 10 p.m. - Beecham House on Masterpi

Lucy Worsley takes us behind closed doors at three royal palaces - the Tower of London, Hampton Court and Kensington Palace - to uncover how each building has shaped a monarchy and a nation. Lucy Worsley's Royal Palace Secrets, watch tonight at 8pm or stream now: www.knowledge.ca/program/lucy-worsleys-royal-palace-secrets | Knowledge Network