Casting 1.1 A study in pink

In this introductive episode, all main characters are present (aside Mary Morstan and Bill Wiggins, season 3). Below are the characters appearing only (or mainly) in this episode.

1.1 - A study in pink

John Watson is a veteran from Afghanistan. He came back to London with a wounded leg, but that's the normality of daily life he can hardly cope with, until he meets a "freak", Sherlock Holmes, with whom he soon shares a flat. Besides, his new friend gets him mixed up in an investigation about serial suicides.

What a good surprise !