Translation Check by Chrouya
Script: Ripped from below raw.
Workraw: [HorribleSubs] Jinrui wa Suitai Shimashita - 05 [1080p].mkv (because I can)

====Format===
#Line Number
Original Line
Suggested Line
{Comment when necessary}
=============

12
Excuse me!
{literally "Mediators!" }

29
{change according to previous episode release}
{UNESCO's Culture Director, if you like}

65 (I'd suggest a retime for 64/65)
to celebrate the culture of electricity!
to celebrate the culture of electricity! A wonderful cultural life!

157
You will most likely survive.
You should be able to survive.
{like, if you had rescued the pegasus. But if you didn't, you'll still survive, albeit in another form}

186
Ladies and gentlemen,
{literally "Sorry to keep you all waiting!"}

242
Oh, it's your right...
{I found this one hard to understand. The expression is "kojin no jiyuu", meaning personal freedom. Perhaps "Oh, by your own will."}

247
{just so you know: Pion comes from Pioneer, and Oyag comes from Voyager}

270
Assistant, did you press a button?
Assistant, you pressed a button, didn't you.
{in the contaxt that he actually did it}

271
Bad stuff can happen when you
What if we get caught up in bad stuff

272
touch strange machines randomly.
because you poked strange machines? 
{it's a what if question. alternative since the former works well with line 273}

359
wild horror from outer space, \Nwhich has destroyed this city!
{I can't find the words myself, but it's all but an example. It /might be so that/ it has destroyed the city}

378
A whole city of shut-ins.
{hikikomori (you can use either of these words)}