- This is the second time that a Resistance soldier named "Sumner" has been killed after going back in time.
- In The Terminator, it was originally scripted that Kyle Reese and another soldier, named "Sumner", were sent to protect Sarah from the Terminator, but Sumner died upon arriving after the time portal fused him into a fire escape (the sequels show the time displacement field melting whatever object is in the way). In the original script, Reese said to Dr. Silberman, "The Terminator had already gone through. Connor sent two of us, but Sumner didn't make it." 
- Coincidentally, the third actor to play a Terminator, Robert Patrick, went on to play a character called Sumner in Stargate: Atlantis.
- Terminator: The Sarah Connor Chronicles
• Aaron • Carlos • Vick Chamberlain • Chola • Kacy Cotton • Michelle Dixon • Andy Goode • George Laszlo • Morris • Matt Murch • Margos Sarkissian • Sayles • Boyd Sherman • Greta Simpson • Sumner • Timms • Cheri Westin • Ed Winston •
• Main characters • Recurring characters • Minor characters •