No spoilers, but Tommy was nice enough to share some pictures of him getting a head mold for his appearance on NBC’s Grimm.
He said the stuff they use isn’t sticky. They put it all over your head – including your hair. The final outer white layer is really hard.
The whole process took about an hour. It does make you a bit claustrophobic, but once you finish, the mold can be used again and again.
Tommy’s first Grimm episode was Season 3, Episode 18.