Stingray - A Christmas To Remember aired on December 20th 1964.
The plot of this is your traditional Christmas Miracle story. It's Christmas Eve in Marineville. Barry Burns is an orphan, who's parents were WASP agents who were sadly killed. Troy and Atlanta go to the orphanage where Barry currently is to make his Christmas brighter. They're impressed by his knowledge of Marineville and WASP, so they go against base orders and bring him back to Marineville for Christmas.
Troy butters up the usually stony Commander Shore and Barry is allowed to stay in Marineville for Christmas, despite the base being on alert after picking up an enemy submarine. Marineville is decked out in a very winter wonderland setting, complete with snow, Christmas Trees and gifts. They decide to take Barry outside for some fun in the snow. Atlanta and Marina build a snowman with him and they take him ice skating.
However, it's not all fun when Phones is captured by the owners of the submarine and is held at gunpoint. Phones is forced to bring Stingray to their location, so the aliens can capture it and use it to take over Marineville and then the world. Barry is thrust into a Christmas he'll never forget as he gets to pilot Stingray in a rescue mission to get Phones back.
Phones is rescued, the aliens defeated at Christmas and everyone returns back to Marineville to celebrate. Barry is given a scale model of Stingray as a present.