- Retroactive Recognition:
- Joseph Bell is played by a pre-Succession Brian Cox. The man with limp who he brings to his class to demonstrate his method is played by Jordan Young, who is probably more likely to be recognised now as PC Jack McClaren from Scot Squad.
- A young Emily Blunt plays Arthur's second wife, Jean Leckie.
http://tvtropes.org/pmwiki/pmwiki.php/YMMV/TheStrangeCaseOfSherlockHolmesAndArthurConanDoyle
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