In the show "Cold Case" how do they switch from young to old?

Question

It's a bit irritating(but very clever)how they switch from the person at a young age,to an older one. They always look like they really would, not like some movies where they just add wrinkles and grey hair and it looks totally fake!

Answer 1

They use a young actor and an old actor, who look alike.

Answer 2

Good Make up artists

Answer 3

Its a show - they do all kinds of make up and screening. But please put some darker makeup on Katherine Moris - she is just scary sometimes with that white ghostly face.