Alaina Huffman as Tamara Johansen - Named Tamara Jon in the character breakdown, she is an SGC medic in her mid-twenties with off-world experience and the rank of First Lieutenant.
Jamil Walker Smith as Ronald Greer - In early casting documents named Ron "Psycho" Stasiak,[REF] Ronald Greer is a "big, strong, silent" Marine with a mysterious past who lacks control over his temper in non-combat situations.