Tonight’s Episode (reruns) – ‘I Know What You Did Last Summer’ July 16, 2009 News "I Know What You Did Last Summer" (episode #4.09) airs tonight, July 16, 2009, at 9 pm/ET. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window) Related