Topps issued several sets of Batman trading cards in 1966. My personal collection includes a number of cards from the Series 1 set.
My collection of television memorabilia includes several random Batman items like a pre-printed autographed picture and some mysterious stamps.
During the mid-1960s the networks experimented with airing serialized TV shows like Peyton Place twice a week (or more) but the fad quickly died out.
Yvonne Craig joined Batman as Batgirl for its third season (1967-1968) in an attempt to reinvigorate the show and its ratings. A short presentation was filmed to introduce Batgirl to ABC executives.