Reign 4x05 "Highland Games" Season 4 Episode 5 Promo - In order to get Mary (Adelaide Kane) to agree to a marriage, Lord Darnley (Will Kemp) must demonstrate his loyalty when she voices her concerns about his true intentions. Catherine (Megan Follows) and Narcisse (Craig Parker) work to repair King Charles’ (Spencer MacPherson) reputation after rumors spread about his strange behavior and threaten the throne. Rachel Skarsten, Rose Williams, Ben Geurens, Dan Jeannotte, Jonathan Goad and Celina Sinden star. Michael McGowan directed the episode written by Robert D. Doty (#405). Original airdate 3172017.