I first “met” this actor in Battlestar Galactica, in the pilot episode.

He played Leoben Conoy, trapped with Cmdr. Adama until he’s found out to be a Cylon and killed by the commander’s hand, in the pilot miniseries.

We saw him again, now and then, over the course of the first couple of seasons, but really got to know him in Season 3, when he kept Kara captive in an apartment designed to look like hers back on Caprica. She kills him over and over and over again, and he just is reborn and goes back to her – with full knowledge of her murder of him.

By Season 4, he was full fledged crazy, but cool, convinced Kara was the answer to the question of life the universe and everything – and the question wasn’t “What is six times nine?”

I’d never seen Rennie before, but then I saw him again in one of the few almost decent episodes of the Bionic Woman remake. He was in an episode of Supernatural, which I just caught up on over the fall. He’s been in this, that and the other thing.

Then, just two weekends ago, he shows up in the very last minute of Harper’s Island, playing the really bad John Wakefield. He did it so well that I didn’t even recognize him until my husband pointed it out, as we were watching “The X-Files: I Want to Believe.”

I was stunned at how crappy this film was. And that Rennie was playing some menacing guy with a bad Russian accent.

Oh, Callum, how could you do this to me?

OK, it’s not your fault, really. I’m sure you agreed to do the film before you realized how awful it would be and then just didn’t want to go back on your word. Right?