Chimera (episode)

Chimera is the fifteenth episode of the seventh season of Stargate SG-1.

Plot
The episode starts with Daniel sitting in a room full of artifacts and books, studying them. A woman appears in the room to help. She introduces herself as Sarah Gardner. Suddenly, we see Daniel sleeping with a strange device attached to his temple, while Osiris sits at his side, having the same device attached to her temple.

In a coffee shop, Samantha Carter is sitting at a table when a man appears and starts flirting with her. After some time, she kisses him, and it is revealed that they already know each other. After some additional talk, she leaves. At Stargate Command, Sam talks with Daniel, who tells her about his strange dream. Next, she enters an elevator and starts talking with Jack about her new friend, Pete Shanahan, and that her relationship with Pete was set up by her brother.

That night, Osiris again appears and enters Daniel's dream. In this dream, she (as Sarah) starts to develop a relationship with Daniel and represents herself as a great fan of him and his work. Abruptly, she ends the connection and uses an Asgard transporter to leave the room, confusing Daniel, though he doesn't wake up.

The next day, Sam has a date with Pete at her home. When he kisses her, she nervously breaks it up. In Daniel's dream later that night, Sarah shows him a tablet with strange symbols (the same tablet in reality which revealed the existence of a lost city of the Ancients to SG-1) and tells him about it. Enthusiastically, he starts translating it.

The next morning at the SGC, Daniel is extremely tired and talks with Sam and Teal'c about his dream. They think it possibly has something to do with his time as an ascended being. In his next dream, Daniel finds out more about the tablet and tells Sarah about it. In reality, he talks with Teal'c again about his dream.

That evening, Sam has a date with Pete. She goes dancing with him, and afterwards they spend the night together at Sam's house. In the meantime, Daniel has another dream about the tablet and Sarah. In the morning, Pete talks with Sam about his past but later leaves frustrated because Sam doesn't talk about hers. In his car, Pete contacts a friend in the FBI and asks him to find out more about Sam, who later reveals to Pete that Sam's background information has been blocked.

At the SGC, Daniel again talks with Sam and Teal'c about his dreams and Sarah. This time Teal'c reveals that there is a Goa'uld device which allows them to enter other people's dream. They talk with Jack and Gen. Hammond about it and develop a plan to capture Osiris. Sam later talks with Jack about her relationship with Pete.

At night, SG-1 supervises Daniel in his bedroom from a nearby truck, when suddenly Osiris appears. Jack and Teal'c enter Daniel's house but keep quiet until morning. Sam continues surveillance from the truck while she, in turn, is watched by Pete who has secretly been following her. In his dream, Daniel finally gives up, admitting he never knew the location of the city. Osiris ends the connection and attacks him with her hand device, but the others intervene. When Osiris can't use her transporter she leaves the house while attacking SG-1 with a small laser. Outside Pete appears, but he and Sam are attacked by Osiris, who has activated a personal shield and blows up the truck. Osiris is stunned by Jack, but Sam realizes that Pete was critically wounded.

At the SGC, Sarah wakes up, after finally being freed from Osiris, and cries on Daniel's shoulder. In another room, Pete is visited by Sam, who finally tells him the truth about her work and the Stargate.