8 p.m. Arrow (The CW)
Based on the DC Comic Green Arrow, a billionaire is shipwrecked on an island for five years and presumed dead, but he is discovered and returns to the city to become an arrow-shooting vigilante.
9 p.m. Supernatural (The CW)
Returning for an eighth season, the Winchester brothers are back to fight more demonic supernatural forces.
9:30 p.m. The Neighbors (ABC)
A family moves from the city to the suburbs, seeking peace, tranquility, and friendly, all-American neighbors, but they discover their block is inhabited by aliens disguised as humans.