Zack and Maddie's slow dance in the episode A Prom Story, punctuated with background music by Kim Rhodes.
London's sentiment on a forbidden boyfriend; "I'd love him even if he were poor" in "Cookin' with Romeo and Juliet".
And then Moseby tells her that he approves of her forbidden romance, even if doing so costs him his job, because "if you really love someone, then you have to think of them before yourself". Whoever came up with the idea for this episode is a genius.
Cody and Barbara Brownstein at the ending of "Orchestra".
When a rival volleyball player calls London dumb and asks if she was speaking too fast, London responds by slamming the volleyball over the net during the game and then asks, "Did I hit thattoo hard?"
The Suite Life on Deck:
Rat Man. 'Nuff said.
Also, Tutweiler and Moseby were once arguing over the Sky Deck (both of them wanted to hold a dance on it at the same time) and Woody said:
Woody: Shut up! You're all acting like spoiled brats!
Moseby, Tutweiler and Cody helping to save Zack, Woody, London and Maya's lives in "Das Boots".
Mosbey getting rid of the snakes in "Snakes On A Boat"
Moseby defying Mr. Tipton was pretty awesome, considering his devotion to his employer.
To elaborate, in the finale, Mr. Tipton wanted to dismantle the cruise ship the cast was on to start a new business practice. Calling in the dismantlers right in the middle of the kids' graduation. Moseby calls him to try to at least have the dissimulation held off till after but Mr. Tipton won't budge (rather Jerkass of him considering it's his own daughter's graduation too). After a brief pause, Moseby tells him off and the graduation goes on as planned. Even the crew that was hired by Mr. Tipton are impressed and allowed the graduation to continue.
The way he says 'Good day to you, sir.' was just awesome personified.