Ok so everybody knows when 25 year olds play teenagers, that may be understandable because there are not enough teenage actors or stars or whatever...
But how would you explain this situation, Hawaii 5-0 series and this guy plays a killer:
http://www.imdb.com/name/nm0855564/
His real age is 49 years old, but on the show they specify that his character is 38 years old. Age does not play any role there, so why could not have he been 45 years old character, why ridiculously fake number?