Another of the grand themes of Series Three is the relationship between John and Sherlock. While John revealed just how much Sherlock meant to him in the here-come-the-waterworks scene in 'The Reichenbach Fall', this series gave us Sherlock's own declaration of love for his friend - in his heartfelt and humorous best man speech. While the entire thing is a series of vignettes that lasts half the episode, the core of the speech is Sherlock's touching words about his own ridiculousness being redeemed by 'the bravest and kindest and wisest human being ever had the good fortune of knowing' and calling himself and Mary 'the people that love most of all in this world.' These frank, very human sentiments act as a testament to how far Sherlock has come since 'A Study in Pink.' That man would never have been so caring and courteous to a (fellow?) human being - let alone speak aloud his feelings for him. As such, this scene makes for a fascinating study in the development of the character and therefore one of the stand-out moments in the series.