They did show it, but I didn't notice it. I watched the aftermath as they took his shoe off and put him on the stretcher, I didn't notice the splinter at all. It was only after Hugh & Chris mentioned it and showed it again that I saw it - they obviously didn't notice it first time round either. Maybe because there was no blood and the NZ & Spanish riders' ripped skinsuits were more obvious.
I heard Chris or Hugh say today that they left the splinter in overnight before attempting to take it out. Probably looking for a big enough pair of tweezers.