I've never really been a fan of Kirkland but now looking back, I realize they should have used Kevin Corrigan much more in the show! He is a great actor, naturally creepy, a 100x more charismatic and believable than McAllister. Mind you, everyone is more charismatic than him, except maybe Smith.
Anyway, after all the disappointments at least I got to know some great actors thanks to the show, like K. Corrigan, Reed Diamond or Jack Plotnick. I already knew Malcolm McDowell before. Bruno Heller is lazy and unimaginative but at least the actors never disappointed us.