Stefanie von Pfetten
The success of THE KILLING MACHINE rests firmly on Dolph Lundgren's shoulders. He has an amazing, cocksure charisma throughout and just looks like a bad-ass should. You can completely tell Dolph directed the movie too because of all the great close-ups and "hero shots" he gets. The supporting cast features the great Bo Svenson and a bunch of mostly-unknowns who all hold their own. Stefanie von Pfetten as the ex-wife in particular caught my eye (and not just because she's rather good looking).
Dolph's direction is mostly competent, although there were times where it felt like I was watching an upper-echelon softcore porn on Cinemax. The budget plays a role in that and is one of only two things holding THE KILLING MACHINE back. You can tell they skimped out on sets and hiring somebody who could write a decent score. The other negative is the script, which is filled with cliches and predictable lines. Not a huge deal because of how awesome watching Dolph is but it was still frustrating at times.