What is demon with the glass hand?

"Demon with the Glass Hand" is an episode from the science fiction television series The Outer Limits. It was first aired on October 17, 1964, and considered one of the most popular and best-remembered episodes in the series.

The plot revolves around Trent, a man who wakes up with a glass hand and no memory of who he is or how he got there. Trent learns that he is a time traveler from the future who has been sent back in time to retrieve his missing fingers, which contain a vital code to save his civilization. As he unravels the mystery of his mission and past, Trent encounters a group of alien puppeteers known as the Kyben who are also searching for his fingers.

The episode is notable for its innovative use of time travel and immersive storytelling, which explores themes of identity, self-discovery, and the consequences of playing with time. Its memorable ending, which is open to interpretation, has made it a cult classic among science fiction fans.