This was one of those moments when I was so, so glad Sylvester was the new Doctor. The gif loses most of the impact unfortunately, because it was one of those amazing scenes when he was just using the power of his voice and his convictions to sell it. AND YOU BELIEVE IT. He did this in several episodes, and between that and the puns, I was utterly delighted — Jon Pertwee was my childhood favorite, but now we had a Doctor who battled using words, the raw power of language and oratory and charisma, to beat armed enemies pointing a weapon at him. Pretty danged awesome.
McCoy and his portrayal of Seven is absolutely amazing. Even though Hartnell / One is my absolute favourite I just love the balance between lightness and darkness McCoy captures so perfectly.