August 3, 1984

Teleplay by BRIAN TAGGERT and FAUSTUS BUCK from a story by LILLIAN WEEZER & DIANE FROLOV & PEGGY GOLDMAN & FAUSTUS BUCK

Music by DENNIS McCARTHY

Robin's male child dies while the baby girl, Elizabeth, begins to grow at a rapid rate. Julie and Robert's analysis of the male child's corpse reveals certain bacteria that affected only the boy, despite his proximity to Elizabeth in the uterus. Encouraged by the sudden development, the duo decide to culture the germs as a potential weapon. Mike and Martin skydive out of the mothership and Martin hides with other Fifth Columnists. At the jail, the team discuss testing what is now called "Red Dust," but firmly rejects Ham's suggestion of using Willie as a guinea pig. Instead, the rebels capture Brian but Robin kills him with a vial of Red Dust. Julie proves it is safe to humans.

The team's priest, Father Andrew Doyle takes Elizabeth to Diana, who shoots him. The rebels evacuate and regroup at a lighthouse where more Red Dust stocks are produced. Ham and Mike argue over delivering the dust before a vaccine can be developed to protect the Fifth Columnists. Martin asks Mike to stop making the toxin revealing the Visitors' contingency plan to use the mothership as a doomsday device but the team agree attack remains the best chance for saving the world.

Julie suspects that Sean has been converted, which Ham confirms. Sean escapes to warn the Visitors but the plan to use US Air Force planes to spread the toxin is a ruse and the rebels actually plan to use hot air balloons. Fifth Columnists plan to take stocks up to the mothership and they have been given a vaccine to protect them. The attack is proving successful and the Visitor forces begin to evacuate and Diana activates the doomsday device. Elizabeth uses her latent superhuman powers to stop the countdown and Martin brings teh mothership back to Earth.