He-Man and the Masters of the Universe (1983)

S02E08 Day of the Machines

When a device unexpectedly fails, Man-At-Arms nearly puts the King and Queen in danger. Concerned that his age is affecting his abilities, he contemplates stepping down from his role. Meanwhile, Skeletor seizes the opportunity to infiltrate the Royal computers with a malicious energy bug named Byte, causing chaos in the machinery. It's up to He-Man to uncover the source of the disturbances before disaster strikes.