The Fourth Horseman (Millennium)

"The Fourth Horseman" is a two-part episode on Stargate SG-1 not yet aired.

"The Fourth Horseman (Millennium)"

Plot

Part 1

SG-1 comes to the assistance of the Sodan when a Prior attacks. Gerak begins a stunning metamotphisis.

Part 2

The surviviors of the skirmish on Sodan become infected with an Ori disease, which breaks quarantine and begins infecting the Earth population.

Notes

• William B. Davis (Prior), Tony Todd (Lord Haikon), and Jason George (Jolan) all first appeared in "Babylon."
• Don S. Davis previously played Captain William Scully, Agent Dana Scully's older brother, on The X-Files.
• Tony Todd previously played Augustus Cole on The X-Files.
• The 60-second openings sequences of Stargate SG-1 and Stargate Atlantis are restored, in The Fourth Horseman (Part 2) and The Hive, respectively.