|Played By:||Tobias Mehler|
A Technician at the SGC, Lieutenant Graham Simmons usually manned his post at the dialling computer. During a mission, SG1 brought back an orb which infected the SGC including Simmons. Unfortunately the only known cure was tetracycline to which Simmons was allergic. Fortunately he survived the incident and continued his work at the SGC.
When Anubis managed to maintain the gate for more than 38 minutes, Simmons was ordered to investigate how this was possible.