The Outer Limits: Don't Open Till Doomsday

On the night of 1929, Mr. Harvey Kry received a box labelled "Don't Open Till Doomsday" as a wedding gift and unexpectedly disappeared—sucked in by the alien of the box. Thirty-five years later, the aged Mrs. Kry, helped with Mrs. Justice of the Peace, finds a young couple bait to free her husband in exchange but the threatened alien turns the offer down and plans to destroy the Earth.