He's going to let Donna explain and give the introductions the smile is still there. "I do. It's just slightly haunted.." He gives the hand a firm shake and he eventually lets the hand go.

There's still that hand in his TARDIS by the console that lured them to the planet of the Hath. "Oh, the hands, well that hand is my own hand. Still how would he..." The Doctor leans over to get a look at Maret again. "Become a hand. It'll be a mystery worth solving one day I'm sure.."

He winces at the mention of what lead to all of this. "No, no fighting. I'm enjoying the peace and I'm sure both Maret and Andrew are also." He gives Maret a wave of his hand. "Anyway, we were here to enjoy the day and I did need to mention there's an energy reading coming from this location."