Saying this really dates me...! But the very first 1950's shows I ever remember watching were "To Tell the Truth," "This Is Your Life" as well as one or two more game shows, and "The Lawrence Welk Show." Oh, and "Sing Along With Mitch Miller" was another. And "Howdy Doody Time" and "Superman" and "Rin Tin Tin" and "Roy Rogers" and "Sky King", etc. I am very musical....so the music shows were the ones that stick in my mind the strongest. A bit later it was "Bonanza" (I was too young to stay up to see that on Sunday nite, but I remember hearing the theme song drifting to me in my bed... It was many years before I got caught up on those! Now I want to get the entire series on DVD.) and "The Rifleman" and "Rawhide" (i can still hear Frankie Laine's song clear as day) and other westerns... I could go on and on, but I'd be getting well into the 1960's and this particular thread is about the '50s shows. Y'see I was born in 1955, so there are some things I distinctly remember even from around the age of 3 or 4. ;-)
For some reason I don't remember seeing "I Love Lucy" till I was maybe 8 or 9...!