Not trying to spoil, but I wouldn't hold your breath or build up your anticipation too much about any cybermen or other monsters. Forget about that and just enjoy the story as it unfolds.
I know, they're probably just cameos in one episode.
War Games, episode 5
Zoe is captured and interrogated, but is rescued by the Doctor.
Tardis #2 reappears in the barn. Jamie, Jennifer, and the US Civil War soldiers are waiting for them. Boom, boom.
The Generals bicker amongst themselves. It's like watching an old married couple. They confirm there is someone higher, someone above them, called the War Lord. One of the Generals is referred to as the "War Chief."
Before Tardis #2 departs, several of the soldiers and Jamie sneak on board. When they materialize on the alien planet, they walk out into an ambush as the Doctor and Zoe watch, helplessly.
* * *
For a few minutes, I was worried we were falling into the "companion is captured, Doctor frees her" cycle, but it's episode 5 and it's the first time it's happened so far. As long as they don't do it again, we'll be fine.
The Generals were fricken hilarious. Their verbal sparring was almost like Crystal and Alexis on Dynasty all over again. I was waiting for them to start a fistfight and then fall into a pool, but it didn't happen. Maybe next time? lol
The regulars were almost an afterthought in this episode. Jamie, Zoe, and the Doctor had only a few minutes of screentime, the rest were all devoted to the guests. It's nice to share the wealth that way in these long stories.
And so ends disc one. Disc two starts tomorrow, and contains episodes 6-10.
I'm kind of getting excited for Thursday, the final episode of this Doctor. At the same time, I wish they'd hurry up and get The Krotons out on dvd.