What Stargate Episode am i talking about?

[Cold Fuzz]

Between two Fires

In wich episode did the alliance between Humans, Tok'Ra and Jaffa end?

Good one. I believe that was Death Knell.

Which episode featured the one and only appearance of the Reetou?

[EvilSpaceAlien]

Show and Tell

In which episode does the ancient healing device that is the basis for the sarcophagus technology first appear?

[Betelgeuze]

Evolution

In which episode does the SGC lose the Egypt Stargate?