Spoilers, Teasers and Speculation
7:25 p.m. Now we're seeing a scene with Lady Mary chatting with whichever suitor isn't Tony. They're bantering about her choice. Will she choose sex or love?
So if Blake is arguing with Mary about choosing sex or love (probably not those exact words, lol), I deduce that means Mary loves Blake but is initially choosing Tony at the beginning of the season. I don't think Charles would argue with her about choosing Tony if he knew she really loved the guy. He would back down and leave the two of them to their life together.
But if Charles knows Mary loves him, he won't give her up without a fight. He's a faithful chap, remember.
Dockery says Mary makes impulsive decisions and then realizes they were not the right ones. (Not her exact words.) And Ovenden says in another post that Charles has been "very busy" this season. I cannot imagine what would be keeping him very busy besides business with Mary.
Does she get engaged to Tony, realize she has made a mistake but figures she has to live with it in typical Mary fashion? Do she and Charles get constantly thrown together over Downton business, making her doubt her decision all the more?
Oooo! I love speculation!
So I am now coming back to what my husband predicted at the end of S4: Bates didn't kill Greene. Gillingham did. And Charles will find this evidence (possibly with Anna's help--ooooo!) and bust up a wedding. Now whether or not that happens, we'll see, but daggum--wouldn't it make a great fic?!?!?!?!?! (Stares at chickwriter....)