B9 robot

The B9 (benign) robot, commonly referred to as simply the robot, was a supporting character featured in the the 1960s Irwin Allen sci-fi series Lost in Space. He was introduced in the first aired episode of the series, "The Reluctant Stowaway" and appeared in every episode thereafter. The bulky costume of the robot was worn by Bob May, while the voice of the robot was provided by Dick Tufeld. Tufeld reprised the role of the robot in the 1998 feature film version of Lost in Space. The robot's signature phrase is the infamous line, "Danger, Will Robinson!"