Juliet: Let's just go to the gallery. Gnomeo: Are you serious?! You're seriously choosin' 'im over me! Juliet: I'm not choosing anyone. Sherlock knows this Moriarty guy and you don't. Gnomeo: We're supposed to be a team. Gnomeo and Juliet, remember? Juliet: We are a team. Gnomeo: Well, it doesn't feel like it. It hasn't felt like it since we moved here. Juliet: Oh, Gnomeo. Gnomeo: Are you with me or not? Juliet: Don't do this. Gnomeo: And there it is. (leaves)
As Watson joins him at the museum, he comforts him and talks about how there are always ups and downs in partnerships, leading to Gnomeo's realization.
Watson: Look, I know you're angry. Gnomeo: How would you feel? It's like she doesn't even care about me. Watson: A partner who takes you for granted. Can't think of what that's like. Gnomeo: I don't know how you put up with that gnome [Sherlock]. Watson: And if we had six months, I'd list all his faults. But despite them, he is a brilliant detective. We all have our good and bad sides. Sherlock, Miss Juliet, me. Gnomeo: You know what, mate? You're right. I shouldn't have left her. I need to go back.
Watson's death. Sherlock is shocked about his long-term friend get smashed. Or so he thought. Even Juliet covers her face in shock.
In the art gallery, Juliet mourns for Gnomeo after he was kidnapped by one of the gargoyles.
Juliet: Oh, Gnomeo.
Arriving at Traitors' Gate, they find Watson alive and he was behind the kidnapped gnome fiasco just to get through to Sherlock after Sherlock had stopped giving him respect, followed by him ending their friendship.
Watson: And now, you and I are finished. Maybe you'll treat your next partner a little better.
Among discovering Moriarty's survival, he saw how Sherlock treated Watson, so he chose him as his pawn and made him think he was in charge, only to reveal now that he wasn't.
After Moriarty hangs up after showing the them his plot to destroy the gnomes, Juliet gives this exchange that relates to the moral of the whole story:
Juliet: Watson screwed up, but you did, too. Sherlock: What did I do? Juliet: The same thing I did. We took our best friends for granted, we stopped listening, we stopped giving them the respect they deserve. They were the last thing we were thinking about, and they should have been the first.