The Outer Limits (1995) : 6x8

Gideon Banks lost his wife Liz and son Simon in a horrific car accident some twenty years ago. At the time of the accident he was involved in something called the Neural Archiving Project - NAP for short. The technology was developed to create smart computers - transferring human engrams to computers. The company eventually gave up on the technology, but Gideon didn't. After years of quietly perfecting it, he built a small robot, from parts he stole from Concorde Robotics, where he now works. Zoe, Gideon's niece, discovers Gideon's secret, the robot contains actual neural engrams from the real Simon. She becomes worried not only about Gideon but also about the robot that sounds and acts a lot like her little cousin used to.