Parasite (audio story)

 was a special release in the Big Finish Torchwood series. It featured Norton Folgate and Andy Davidson.

Publisher's summary
Enter the world of 1950s Torchwood!

Gangsters are vanishing from the streets of Soho, there's a deadly Nazi secret on the loose, and something's moving in the smog. Norton Folgate should be sorting this out, but the Torchwood agent is in disgrace. Who's going to save London this time?

1. The Man From Room 13

2. Meet Mr Lyme

3. The Mould

4. The Spread

5. The Dead Hand

6. The Liberty of Norton Folgate