Sherlock Holmes, Dark Son, Dark Father

The mastermind behind all the terror and death in London is exposed.
But can he be stopped?
Mister Dark finally meets his father.
Who is the one most to be feared?
The battle to stop the terrors haunting London has intensified.
Is anyone safe from the Dark Son and Dark Father?
Sherlock Holmes and Watson, joined by their friends of the Brotherhood face the most deadly and murderous challenge of their lives.