Sherlock, Series 3

Sherlock Holmes:
Ladies and gentlemen. One last thing before the evening begins properly. Apologies for earlier; crisis arose and was dealt with. More importantly, however, today, we saw two people make vows. I've never made a vow in my life and after tonight, I never will again, so, here in front of you all - my first, and last, vow. Mary and John - whatever it takes, whatever happens, from now on, I swear I will always be there. Always.