mad men christina hendricks joan tale of two cities 'Mad Men' Season 6 episode 10 photos: Is 'Tale of Two Cities' big for Roger and Joan?Megan Draper murder theories aside, we have absolutely no idea what might happen on the next “Mad Men” and we’re perfectly happy about that.

Season 6 has been full of surprises big (the merge!) and slightly-less-big (Don back in bed with Betty; Peggy stabbing Abe), plus wacky touches like Don’s drug trip and Sally’s encounter with home invading Grandma Ida.

Judging by these photos, we know we can expect screen time for Joan, Roger, Pete, Peggy, Ted and — of course — Don in this week’s episode, “A Tale of Two Cities.” Plus, a Bert Cooper sighting!

The typically vague episode description: “The agency works to keep a client; Joan is caught off-guard.” Could that mean a proposal from Bob Benson? Greg’s return? Bad news at work?

We know where we’ll be Sunday night.

mad men harry hamlin kevin rahm vincent kartheiser tale of two cities 'Mad Men' Season 6 episode 10 photos: Is 'Tale of Two Cities' big for Roger and Joan?mad men christina hendricks john slattery tale of two cities 'Mad Men' Season 6 episode 10 photos: Is 'Tale of Two Cities' big for Roger and Joan?mad men robert morse bert cooper tale of two cities 'Mad Men' Season 6 episode 10 photos: Is 'Tale of Two Cities' big for Roger and Joan?

mad men john slattery vincent kartheiser tale of two cities 'Mad Men' Season 6 episode 10 photos: Is 'Tale of Two Cities' big for Roger and Joan?
mad men elisabeth moss peggy tale of two cities 'Mad Men' Season 6 episode 10 photos: Is 'Tale of Two Cities' big for Roger and Joan?
mad men jon hamm don draper tale of two cities 'Mad Men' Season 6 episode 10 photos: Is 'Tale of Two Cities' big for Roger and Joan?
Check out even more images in our “Mad Men” Season 6 gallery.