Which actress stars almost alone in the episode 'The Invaders'?

Agnes Moorehead stars almost alone in “The Invaders,” playing the unnamed woman who lives by herself in a remote farmhouse. Her performance is the episode’s center because she spends nearly the entire story reacting physically to unseen danger and battling tiny attackers.

The woman hears a deafening noise and discovers miniature figures emerging from a small flying saucer on her roof. They injure her with tiny weapons and a knife, pursue her through the house, and force her into a desperate fight for survival. Moorehead’s character never speaks; her fear, pain, anger, and determination are communicated through movement, facial expressions, and cries.

The episode is unusually sparse even by anthology-television standards. Apart from Rod Serling’s narration, the only spoken dialogue comes from director Douglas Heyes, who voices an astronaut inside the spacecraft. Richard Matheson wrote the script, and Douglas Heyes directed it.

The final reveal reverses the apparent premise: the “invaders” are human astronauts from Earth, while the woman is a giant humanoid native to another world. That reversal is why Moorehead’s solitary performance remains so memorable.