I just started watching Season 3 of the original series again after all these years, and I have to say I love this episode!
I know a lot of people hate it, and claim it marks the point when the series jumped the shark, but come on, it's fun!
One of the reasons I love this episode is that Marj Dusay is in it – she's the brain stealer! Today, when it seems all actresses are stamped out of the same Hollywood mold, Marj is refreshing as a unique look and talent. She was also on Hawaii-50 twice, once as a policewoman, and once as a criminal/girlfriend for undercover Steve McGarrett!
Yes, it's a bit silly that such an advanced civilization needs Spock's brain… or maybe just good old-fashioned Pulp?
The episode even includes a full-scale battle between the landing party and a bunch of oversized barbarians (sadly, it doesn't make much sense – let the barbarians attack, wait for it… then stun them? why not do that in the first place?). There's also an amusing brawl in the 'jail', two barbarians vs Kirk, Scotty and McCoy!
If you're looking for something to battle, I suppose Chekov's relay party on the surface might have been attacked by the barbarians.
So – fun episode, not a lot here to wargame, but I'd buy the figures if someone made them!