It's time for Reign's Mary to take the plunge. The Queen of Scots is headed to the altar this week to marry Bash, but will she make it all the way there — and will Francis return to stop it? Only one thing is certain: the bride will rock a ravishing gown. Also exciting is the fact that Mary's mother (guest star Amy Brenneman) will be in town for the wedding. Apparently she has her own ideas about what Mary's future should look like. Very interesting! Take a look at the pictures before "Consummation" airs!