Australian actor David Lyons is best known for his role as Leading Seaman Josh Holiday on the Australian drama Sea Patrol and as Dr. Simon Brenner on the long-running NBC medical series ER. On ER, Simon Brenner is portrayed as superficially very charming especially when it comes to women. Also, he is seen as a talented physician but unwilling to teach new medical students. He graduated from Australia’s National Institute of Dramatic Art with a degree in Performing Arts in Acting in 2004. His other screen credits include the 2008 comedy Four as Kit, the 2008 crime drama Cactus as Eli, the 2007 horror Storm Warning as Jimmy, and the 2005 comedy Elemenopee as Jimmy. In 2009, he was cast in the NBC sci-fi series Day One.