Yes, it's been a ridiculously long time since I did a King of the Lab. Sorry!
Name the episode where Booth effectively calls Brennan 'babe' in conversation with her. This isn't a 'yes' you're attractive, etc. This is him talking to her and he uses 'babe' where he might normally have said 'Bones.'Apologies if there is more than one but, to my knowledge, this only occurs in one episode.