Season three of Stargate Atlantis, an American-Canadian television series, began airing on July 21, 2006 on the US-American Sci Fi Channel. The third season concluded after 20 episodes on February 5, 2007 on the Canadian The Movie Network. Holly Henderson is a screenwriter and television producer. Holly Henderson is the sister of Ella Henderson. Daniel Jeffery Henderson, is an American mixed martial artist and former Olympic wrestler, who competes as a middleweight and light heavyweight in the Ultimate Fighting Championship.