Can not unhide some bones https://www.blendswap.com/blends/view/78956#comment-114838

       I have to tweak this rig so I need to unhide bones in arms and legs. I've found them in the properties panel but Alt+H does not do any good.
Select the armature, go to properties/armature/bone layers and shift click on every layer to search all the bones of the skeleton. Uncheck the "shapes" option to turn off custom shapes.