Excellent question (What happened to Mighty Machines?)! My grandson loves this show too, and we can't figure out why it disappeared either. Please, pretty please, bring back "Mighty Machines"!!!! It's just so refreshing to watch a show for kids that isn't all cutesy pie and sugary sweet or made up of weird little characters who try and deliver some kind of moral message. Too many children's shows today are terribly boring, even for little ones, and "Mighty Machines" was such a welcome change up, especially for little boys.