I'm watching the third hour of Day 3 of 24, and I've gotta say, I really think Gregory Itzin would be perfect for Zife. Another plus for him would the fact fact that he's played 5 different Trek characters, one of which was as recent as "In A Mirror, Darkly Part II".
Interesting. I was watching Day Six when it was airing a few months ago in the US, and Peter MacNicols' performance as Tom Lennox struck me as being absolutely perfect
for how I saw Min Zife: The same inner weakness and indecisiveness combined with arrogance.