It's tough to find any vintage advertising or promotional material for 1973's The Starlost, the Canadian-produced, syndicated science fiction series created by Harlan "Cordwainer Bird" Ellison. Every once in a while, though, I stumble across something.... like this, for instance: This odd, Biblical-inspired, hand-drawn ad (presumably by someone at WMAQ) appeared in the Northern Indiana edition of TV Guide for the week of September 22-28, 1973.
And then, there's this one, featuring pen 'n ink portraits of lead Keir Dullea and his co-stars, Robin Ward and Gay Rowan. I'm not entirely certain of its provenance, but it clearly ran in a Canadian television listing magazine (did they have TV Guide in Canada in '73?).