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It's payback time!

In this clip from tonight's season finale of The Royals, Prince Liam and Princess Eleanor plot their revenge against Ted Pryce for their father's murder with the help of their security detail, Jasper and James Hill. But, of course, no retaliation plan is complete without the master of schemes: Queen Helena.

"What are we doing about Ted Pryce?" she asks.

"We need to keep him close," Jasper responds. "But whoever does it will be in jeopardy. The man's a psychopath and he'll be armed."

"I'll do it," Liam volunteers.

"No, I'll do it," Helena says. Uh oh!

Watch the entire cunning clip above!

Don't miss the season finale of The Royals tonight at 10 p.m., only on E!