Professor McMoo is a very clever cow - so clever, in fact, that he has managed to build himself a time machine from discarded farming machinery. He and his two cow friends, Pat and Bo Vine live on the Barmer farm, in fear of the hideous farmer's wife, Betty. But they are also star agents of the CIA - Cows in Action, a crack team of cow commandos! In the future, cows live peacefully with humans as equals, not as food. But some cows in the future try to use the technology of time travel to interfere with history - and the Prof has to help stop that!