The pair are bottom of our latest popularity poll along with Patrick Robinson, although the Casualty actor's higher score could save him.
Rugby hunk Ben was bottom of the judges' scoreboard for the first time at the weekend after dancing the Charleston, while Mark was just a point higher.
With the bookies and Mark is the clear odds-on favourite to go in this evening's latest Strictly results show.
Alex Donohue of Ladbrokes said: “It’s looking like an absolute certainty that Mark will dance for this last time this weekend. If anyone else gets the boot, it will be one of the biggest telly betting upsets of the year so far.”
At the other end of the voting and it looks like it could be an all female final.
BBC newsreader Susanna Reid, popstar Sophie Ellis-Bextor and Corrie's Natalie Gumede occupy the top three spots respectively after the latest live performances.
The Strictly Come Dancing results air tonight on BBC One.
Browse pictures of the latest Strictly performances...