There are several upcoming episodes of Columbo on miscellaneous Saturday nights on the Hallmark Channel. Biography channel is also running some. Upcoming titles include: A Stitch in Crime, Murder, A Self Portrait, Columbo Cries Wolf, The Most Dangerous Match, and The Most Crucial Game.
Check local listings, but these are the July episodes that I know of so far.
Halmark Channel Columbo Double Feature on Sundays for the balance of July as posted by my Digital cable Guide in San Diego
7/9 Most Crucial Game, Requium for a falling Star
7/16 Stich in Crime , Most Dangerous Match
7/23 Double Shock, Lovely But Lethal
7/30 Double Exposure, Publish or Perish