I have really enjoyed this idea. I thought the chemistry early on was great. I always imagined the tesnions was still there off camera.

Now, spoilers

Beckett said in "epiphany" that he "has a date with Lt. Cadman" to which Rodney made a little quip...I think he's jealous of Beckett having someone.

Then (Spoilers)

Lt. Cadman is back next week in critical mass and the flirtation is refferred to between her and beckett in the spoiler section.

Like I said i hope she becomes a recurring character, and is involved mor eon the show. I prefer seeing Beckett and Mckay having romantic possibilites more then Shep.