When video options peaked at, maybe, five (and the term “video” had another meaning and was little used), viewers in the Eisenhower decade were still delighted with the nightly choice between Johns Hopkins Science Review on Dumont and Meet Mr. McNutley on CBS. These were the days when Washington Post TV critic Tom Shales watched the tube for free, and apparently with far more enjoyment. As part of the Smithsonian’s “The Fabulous ’50s” series, Shales shares his gilded memories of TV’s Fabulous ’50s tonight at 8 p.m. at the Ripley Center Lecture Hall, 1100 Jefferson Dr. SW. $20. (202) 357-3030. (DN)