Singularity
S1, E115: The SG-1 team rescues a little girl, the sole survivor of a disease that wiped out a planet, only to find she is a human time bomb, designed by the Goa'uld to destroy the Stargate.

S1, E115: The SG-1 team rescues a little girl, the sole survivor of a disease that wiped out a planet, only to find she is a human time bomb, designed by the Goa'uld to destroy the Stargate.