With both the invaders and the panther-thing gone, Liz's attention quickly turns back to Brian.  She sees him sway slightly, then start to topple.  With one smooth motion she grabs onto him, keeping him from hitting the mud, then starts to pull/carry him onward towards the castle.  As she moves, startled by how light he feels, she tries to calm him.  "It's alright Brian.  I've got you.  You're safe with me..."  She just hopes she isn't lying to him.