Yeah, I'm of the same mind with the spear of destiny episode. Definitely my least favorite. And I have been noticing the degrading level of realism. I love the show and hate to say it, but I think it's spiraling downhill.
Ah well, I have seasons 1,2, & 3 on DVD (still going to grab up 4 when it comes out, of course), so I can get my Unit fix whenever I need it.