So, we learn more about the Reavers. Having Jayne panic at the thought of meeting them said a lot. These are not nice people. Reavers sounds like some kind of perhaps bloodthirsty pirate; clearly these are something else. All that was needed when exploring that ship was some kind of motion detector making regular thumping sounds...
By the looks of it, they were a bit limited with just how nasty the Reavers could be shown as; lots of things in shadow.
River seems to be showing some of whatever her abilities are. The Alliance captain was also a bit of a jerk, though not a complete one.
Ah yes, the people who were experimented on until they became mindlessly savage rape machines, except for being able to operate and maintain a space ship. I get the appeal of the tropes, basically Indians or Tartarians, I don't think it's solid.
There's always the problem with the Reavers in that what they show us are basically "fast zombie types" (which also includes living but rabid, etc.), but apparently can maintain interactions with each other well enough to fly ships. They'd have worked better as controlled shock troops for someone or else people who are normally functional but go berserk once hand to hand combat begins.
As for the Alliance captain, I can actually see his point of view. Remember, most people don't believe in Reavers, and this appears to include mid-level and lower military officials. So this captain has come across a massacre and the people he finds there are blaming it on something that "doesn't exist". He changes his tune pretty quick once he realizes the truth.
Re; The Reavers; The idea works perfectly well if the Reavers are some part of humanity that settled in some distant part of the Star System lost to history, that supplements their income with piracy and uses brutality to keep Alliance citizens away. Like Apaches from late westward expansion, or some distant Old Believers convent fortress hidden in northern Siberia. But to make them completely off the spectrum as murder zombies with a fondness for gang rape, how would they function? To me, it's like making a movie about Bigfoot chasing after some cowboys on his motorcycle.
I'm glad I can say that I still find the show good. Even if it has been a while.
The interrogations, the poor doctor doctor getting pranked again. Kaylee getting upset when Alliance Captain insults Firefly etc just makes it enjoyable.
They might overselling The Reavers a bit though. Really building up how extremely scary and dangerous they are.
You get the feeling this might be a bit hard to live up to in the end,