“The Shakedown” is the title for the May 12 episode of Reign and The CW has released a description with spoilers to promote it. You can find that below; enjoy!
MARY MUST DEFEND HER THRONE — After a tragic earthquake hits Scotland, Mary (Adelaide Kane) must face John Knox (Jonathan Goad) amidst claims that she isn’t coming to the aid of her people. Elizabeth (Rachel Skarsten) takes drastic measures after she is discovered with Gideon (Ben Geurens), while Charles (Spencer MacPherson) makes a decision that backfires. Dan Jeannotte, Celina Sinden, Megan Follows, Craig Parker, Ben Geurens, Rose Williams and Will Kemp also star. Norma Bailey directed the episode written by Patti Carr and Lara Olsen (#412). Original airdate 5/12/2017.
UPDATE: We now have some photos!