I didn't come into this with any expectations, not being a Sherlock fanboy or even a boffin...
Though I am a fan of BC's interpretation of Holmes.
As someone who has lived half a century, I have to say, that this show took me back... Took me back to being a youngster, being someone against The Establishment... the person I used to be, looking forward rather than back...putting hardships behind me and watching the future with shades on.... to protect my eyes from the light.
If I may wax lyrical for a moment, I come away from this feeling that this show is basically a metaphor for the optimism of youth in the face of catastrophe.
Our young protagonists, on the verge of facing "real life" have to come to terms with what they have to lose....
Which arks back to the beginning of the show where Leo is asked, what he has to lose..... And he realises that he has more and more to lose as he goes on...
This episode brings all the feels home. If you can't feel anything in the final 15 minutes of this, you are a colder man/woman/person than I.