This is from Nathan Fillion on Twitter about an 'Easter Egg' he inserted into the first scene from last night's 'Castle'. Look closely, when Mal comes out the door- under the gun, under the boat, just to the right. It's a nothin' part, till ya need one. How did the catalyzer come to my possesion? I got it the same way Mal would. I stole it. He calls himself 'Mal'!