Cassandra "Cassy" Harrington | Emma Watson

Sherlock Holmes/William Sherlock Scott Holmes - fun fact, in Doyle's works, his full name is Sherlock Holmes, BBC added the rest. But their father is, in the book, called William Scott Holmes, and their mother Violet Mycroft, so I'm guessing that's where they got it from even though it hasn't been confirmed | Benedict Cumberbatch

John Hamish Watson | Martin Freeman

Mycroft Holmes | Mark Gatiss

Molly Hooper | Louise Brealy

Rosamund  Mary Morstan/Mary Morstan/Mary Elizabeth Watson | Amanda Abbington

Graham... Garry? No no, it's George Lestrade | Rupert Graves

The rest are still part of the story I really just wanted an excuse to look at cute GIFs