Fifth

The fifth of the human looking Replicators found on an Asgard planet. He was the only one of the 6 Replicators that had moral objections on probing the humans minds, an opinion that the others considered to be a flaw. He was promised by Samantha Carter to be taken from the planet when the planet was to be frozen in time, but Colonel O'Neill thought otherwise. When the team left the planet, all but O'Neill had some moral issues with this action.

The role of Fifth was played by Patrick Currie.

Fifth also appears in the New Order (SG1, Season 8).