Summer Lyn Glau is an American actress best known for her roles in science fiction and fantasy television series; as River Tam in Firefly and its continuation film Serenity, as Tess Doerner in The 4400 (2005–2007), as Cameron / Allison Young in Terminator: The Sarah Connor Chronicles (2008–2009), as Bennett Halverson in Dollhouse (2009–2010), as Skylar Adams in Alphas (2011–2012) and as Isabel Rochev / Ravager in Arrow (2013–2014).
- Born: 24 July 1981 (age 36 years), San Antonio, Texas, United States
- Height: 1.66 m
- Nationality: American
- Spouse: Val Morrison
- Children: Milena Jo Morrison