I remember an ep in season 5 where Angel was dreaming about Buffy and you could only see a blonde head from the backside, that wasn´t Sarah either. I think it was the ep who Angel had a parasite, I don´t know.

Wasn't the one where she was having sex with Spike in his bed? Maybe I'm making that up But I know what scene you mean - the one where she's dancing in Italy isn't Sarah, either, but they tried to excuse that in the comics by saying that she was a genuine double and it wasn't just they couldn't get Sarah back!

In some shots she was - but when they cut back to Spike watching them, I guess they needed Sarah as the First as well, so they had the stunt double kiss David. Luckiest stunt double, ever

I remember those eps. I thought that ep where Angel dreams of seeing Spuffy having sex was so annoying. I don't understand why they were trying so hard to bring Bangel back together?

Both shows are over so it's really a non-issue unless one of them comes back in some form.

For the Bangel fans

That's so stupid because Bangels stopped watching once they realized ATS was Bungel in LA

it was a slap in the face to cangel fans (which were the majority of show viewers until s5 remember they claimed that there were only like 15 of us, but later when the show got cancelled we (cordy/cangel) fans were partially blamed~all 15 of us
i for one was no longer a loyal viewer but still watched in hopes that we would get a surprise visit from cordy but usually i would end up switching to something else until the last few minutes)