This was an awesome line: "You're too late, Doctor. ... And you're really very obvious. I know you haven't arrived with a weapon. Only a speech, some dazzling words, maybe a pun, and then some lachrymose little tug-the-heartstrings mimosa-scented platitudes about the power of love."
(I've got lots of Thoughts about this episode, mostly critical of the plot, but the acting was on point and that line is awesome.)