Colonel Maybourne is gonna be the one who opens it 

Show: Stargate SG-1
Season: 6
Episode: 15
Title: Paradise Lost
Original air date: 31/01/2003
Full episode on Stargate SG-1 official channel: • Paradise Lost
IMDb: www.imdb.com/t...
Fandom: stargate.fando...
Gateworld: www.gateworld....
Stargate Command channel: / stargatecentral
In this clip:
Tom McBeath as Colonel Harry Maybourne
Richard Dean Anderson as Colonel Jack O'Neill
Don S. Davis as Major General George Hammond
Amanda Tapping as Major Sam (Samantha) Carter