CSI: Miami April 8, 2012
Nothing too exciting about this particular episode, but as I watched it I kept thinking I recognized the guy who was interviewing Calleigh about the foster kids.
Finally got around to looking him up, and it was Barry Livingston, Ernie from My Three Sons. I hadn't recognized him in anything else lately, but I kept staring at his face, knowing that I knew him from something else. Boy I like the "episode cast" function on IMDB. It didn't have a character name listed, but I knew I recognized his name when I saw it.