Replying...
Intro. When the Mikaelsons thought their brother Finn was dead, they stopped the Russian project under Mystic Falls when it exploded and Finn was close to it, but they did not know that he was alive and the Russians captured him while he was unconscious.،The Russians took him and sent him to Russia to a Russian prison after he had been modified and his hair shaved.

Russian prison, Alex Seramova

@Alex