Holding the rank of captain, Samantha Carter joins the SG-1 team in the pilot episode, " Children of the Gods ". She comes under the temporary control of the Tok'ra Jolinar in season 2 and retains many of her memories, leading to an alliance with the Tok'ra against the Goa'uld. Carter's brief merging with Jolinar also assists her in detecting a Goa'uld presence and using certain Goa'uld technology. Carter is promoted to the rank of major early in season 3. When an advanced lie detector shows they are concealing something in early season 4, it forces Carter and her superior officer, Colonel Jack O'Neill, to admit that they care for one another "a lot more than [they're] supposed to". In Exodus (season 4), Carter uses a stargate to destroy a star by dialing the gate on P3W-451, the planet being consumed by a black hole (originally discovered in A Matter of Time), and launching the active stargate into the nearby star; the resulting imbalance in mass causes the star to go supernova and destroy Apophis 's fleet.