Season Four
The MALP sent to P9C-372 suddenly begins to fly, a glimpse of a some structures are seen briefly before a massive feedback shorts out the computers.
A sentient entity has travelled back to the SGC, taking over the MALP room; it soon threatens the whole base.
Sam attempts to communicate with it, and it transfers itself to her.
Jack has to make a tough decision, his friend and colleague or the safety of the SGC?
This episode was originally called Child's Play