Things are getting pretty tense over on Revenge, and Season 3, Episode 18 (“Blood”) won’t be disappointing us. With Mason Treadwell (Roger Bart) coming back into the fold, he’ll be sitting pretty — albeit in prison — holding all the secrets between both Emily Thorne (Emily VanCamp) and Victoria Grayson (Madeleine Stowe).

We enter the scene in this sneak peek to find Emily ominously staring out the window, you know, like normal people do. The diabolical dame seems surprised when her phone begins ringing. Who might be calling, you ask? Mason, of course!

After a short hello, Emily gets super upset and reminds Mason that he had promised not to contact her as part of their bargain — but he’s not having it.

Head over to Zap2it to see the dramatic sneak peek.

“When exactly do you intend to keep up your end of the deal?” he asks, calling out the recent stumbles in Emily’s grand scheme (read: almost dying at her wedding). Mason brings up the fact that he could have been stuck in jail had she actually bit the dust. “I want to renegotiate,” he says.

When Emily reminds him that he has no leverage, Mason is quick to prove her wrong. “I had a visitor,” Mason tells her. “We gabbed about old times, laughed about a certain juvie girl.” Nice threat, dude. We’re glad to at least know that he didn’t rat Emily out.

“What do you want?” Emily asks.

“To know how you intend to keep your promise to me,” he bargains. “Show me your hand within 24 hours or I’ll show my visitor mine. Tick tock goes the clock.”

Are you worried about Mason’s threats or does Emily have everything under control? Hit the comments and speculate!

Revenge airs Sunday nights at 10 p.m. ET on ABC.

Carson Blackwelder is an Associate Editor at Wetpaint Entertainment. Follow him on Twitter and Google+!