Sherlock wakes up in the hospital and feels like his throat is a gravel pit. Slowly, he opens his eyes and Mycroft's face comes into focus. (What the hell?) The expression on his brother's face reminds him of all the times Mycroft put plasters on his skinned knees and spider bites. He puts the thought out of his mind.
After expressing his incredulity at Mycroft, he compares him to Father, and Mycroft does something amazing: he makes Sherlock laugh. The two men chat civilly for the first time in years.
As Mycroft departs, he tells Sherlock that he's glad he didn't have to plan another funeral. "You're very lucky to have been granted another chance, baby brother. I implore you not to waste it."
Sherlock stares at the ceiling. (Still alive. How very dull.) His greatest fear is that he'll never stop being bored.