This is just something I put together with the grey parts I had left over from my last Moc. I hadn't even decided on the idea for scene. Any way its sort of based on the classic Doctor Who story "Inferno" that stared Jon Pertwee in his last first season story and marked the last appearance of his companion Liz Shaw.
Aside from not having more grey bricks to add more detail, the other thing that was short in supply were the lego troll figures and other Imperial figures that were not Storm Troopers. I've also wondered if I should have included Lord Vader.
For the back story I figured it would be the same as the episode "Inferno",
Whilst drilling through an Imperial Planets crust to harness energy from its core. The Imperials unwittingly release a type of gas or ooze that any one who came in to contact with under went a horrific metamorphic change in to something savage.