Well, this episode had a couple of interesting twists. I was expecting Future Kelly to show up with a dire warning or something, but instead we got Past Kelly, pulled from the morning after her first date with Ed, because that's what she happened to be thinking about when the gravity wave hit. I liked how they justified that bit of convenience with the whole quantum-uncertainty-observer-effect phenomena that "even the Kaylons" don't understand.
I have to say that the actress did a great job of differentiating Past Kelly from Present Kelly in her face and body language. She has changed quite a bit in seven years, but those seven years involved marriage, divorce, and promotion from lieutenant to commander, and a first officer posting, so it's not too unbelievable. Ed's flirtation with continuing his relationship with Past Kelly was well handled-- the temptation to go back to the beginning and start over with the advantage of experience was, understandably, too much to resist, and yet that seven years of experience ultimately compelled him to back off. Generally speaking, the relationship between Kelly and Ed is one of the most mature I've seen on a TV show, which is funny on a show that did, and still does, have its share of lowbrow humor. But then, all of these clowns have a tendency to step up when the heat is on.
The dance club scene was painful, but amusing. I got a kick out of Ed and Gordon showing their age by sitting in the corner and complaining about the noise-- although that would have been me even when I was twenty.
Talla being a fan of raucous music didn't surprise me, and Yaphet's spiky dance moves cracked me up. But Bortus and Klyden win the prize for bad dance moves. And when I say bad, I don't mean bad, I mean bad.
The sequence with the two Kaylon ships was interesting. The trick with the ice in the ring system was clever, but I really think this was foreshadowing-- I think the season finale will involve a changed timeline in which the Kaylons rule the galaxy, hunting down the last remaining biological life forms because Kelly and Ed's marriage and divorce led to the entire sequence of events that defeated them.