Ferengi pirates use Acme Knock-Out Gas to take over 'Enterprise'.
I was one of those DS9 fans who hated the yearly 'Ferengi' episodes, because they weren't that funny really, and destroyed a species that TNG had actually introduced to be their new enemy! However, IMHO this is one of the best Ferengi episodes ever. OK, the plot is predictable, and it uses many elements that we've seen before already. The 'lets play along with hidden bank vault idea' is overdone. But, it does have Ethan Philips, Jeffrey Combs, and Clint Howard. Plus, the Ferengi were actually quite threatening, not just comic foils. We also saw the return of the Ferengi whip, not seen since 'The last Outpost' TNG. Nothing mentioned about the females wearing clothes though, I thought that they would find that more shocking.
Then they had a run-in with Phlox's bat, not to mention his trash can, and they nearly fired at a biobed. We now know that Ferengi favour purple striped socks, and like to sniff other people's food. And their boots! And it looks like Trip, and Chef, have introduced pecan pie to the Ferengi too.
I was trying to listen to the Ferengi speech, which we haven't heard before, and I think the Ferengi with the ear fettish (who was checking ear sizes, and was interested in the pointy ones) said "DaiMon" and "Latinum" before the translator kicked in. Even though the teaser and most of the first half was in Ferengi, there was no problem understanding what was going on.
Also, I like episodes like this when one or two crew have to save the ship against all odds ('The Basics pt2' VOY, 'Rascals' TNG, 'The Game' TNG, and 'Starship Mine' TNG.) Brannon Braga compares Trip to Bruce Willis, but I must have missed all the 'Die Hard' action packed fight sequences, explosions, and special effects, since Trip spends most of his time sitting on a balcony watching the Captain being smacked in the face. It’s getting to be another tired cliché seeing Archer getting thumped every week. He needs some self-defense classes or else a bodyguard. This was also the long-awaited episode with Trip in his underwear, though the reports of him in his longjohns for the whole episode were widely exaggerated.
As far as continuity goes, Krem's parting "You'll never see US again," was enough for me, they never find out who they are.
We also got to see the 'Biomatter Resequencing' room, for those asking "How Enterprise cleans itself", I noticed a 'metal waste' processing unit also, so they must have some kind of primitive matter replication system.
The best part was when they found Porthos (it went something like this):
"It's a lower lifeform, probably the Captain's next meal!"
"Don't be stupid! Look at the size of it's lobes!"
The Acme knock-out gas has no effect on dogs, apparently!
Other good lines:
"Everyone knows you'd steal earwax out of your mother's ears."