|Blackbird from "Flight of the Phoenix"|
This ship is what allows Kara to get close-up shots of the resurrection ship a few episodes later, an act for which she is promoted by Admiral Cain (even though it was against orders, but whatevs, it's Starbuck; she does what she wants), because of the carbon composite coating, making it invisible to radar. It even has FTL capabilities, which no other Viper has, which proves that it is even more valuable than initially predicted. Sadly, the ship is destroyed in the battle to destroy the resurrection ship, so we don't ever see it again. It's hard for me to believe that, particularly with Pegasus' Viper factory, no one thought that they would need to make another Blackbird. I mean, they've got the supplies and building space available, and it's obvious that this is an incredibly valuable tool in their fight against the Cylons. Alas, all we ever get to see of the Blackbird after it blows up is whenever we're looking at "previously" sequences discussing Lee's sudden onset of depression and self-loathing. Sigh.