Episode 99 of "Stargate-SG1"
s05e11 Desperate Measures

Carter is kidnapped by mysterious men, and taken to a medical facility. The SG team try to find her, and O'Neill contacts Harry Maybourne to try to find her. Maybourne claims the NID, and Col. Symmonds, are behind the abduction, but Symmonds claims Maybourne is responsible. It turns out Maybourne helped a rich, dying businessman, Adrian Wright, to get hold of a symbiote so that he could use it to cure himself. But he needs the medical data from Sam's body (due to the fact she was possessed by a symbiote) to make it work. The SG team tracks Sam down before they can do the necessary autopsy to get the info they need, but not before Wright has the symbiote put into his body. The symbiote/Wright is cornered by O'Neill, who is shot by Symmonds and helps the symbiote to escape. While the team thinks Maybourne shot Jack, Symmonds and symbiote/Wright begin to negotiate for the symbiote's knowledge.