In the construction scene during the Knights of the Road episode, Murdock is supposed to be gone in Mexico. However, the scene clearly shows Murdock's arms helping to wash the truck etc. Also, when they put the bright, shiny hub-cap on the truck you can clearly see Murdock in the background watching. So, is he there or not?
sometimes scenes are shot out of sequence. the producers probably had a script change which reflected murdock not being in a particular scene. i see this a lot iin other shows as well.. ;)