Weird theories continue to show up, as you'll see below... Kn'thrak claims to have found a Grikath in an episode of Futurama! Here's what he says...
When watching an episode of "Futurama - 3x08 - That's Lobstertainment" I noticed a ship do a fly by of the Space Delivery Building. I put the video into slow motion and noticed it to be a Kilrathi ship from the series Wing Commander - Academy. I made a screenshot and a video cature of the Kilrathi shop.
Video Cature from Futurama Episode
Screenshot from Futurama Episode
Video Capture from WCA
http://users.bigpond.net.au/knthrak/WCA Kilrathi Attack.avi