Mary Feels Betrayed & Fights Back on Tonight's 'Reign'

Mary (Adelaide Kane) and Greer (Celina Sinden) get serious in this still from tonight’s episode of Reign.

In “Leige Lord,” when Mary learns of a secret clause in her marriage contract that her mother, Marie de Guise (guest star Amy Brenneman), and Queen Catherine (Megan Follows) orchestrated, Mary and Francis (Toby Regbo) embark on a dangerous plan to turn Scotland against her mother � and Mary gets her first taste of power as the Queen of Scots.

“Leige Lord” airs TONIGHT @ 8PM on The CW!