Four more adventures for the 6-ft talking dog and his friends. In 'Safari So Goodi!', the gang have to work out what's going on when all the animals start disappearing - and being replaced by yellow ghosts. In 'Roller Ghoster Ride', the friends are looking forward to a fun day out at Thrillrides, an adventure park. But their fun soon turns to danger when a series of strange 'accidents' occur on the park's rides. In 'It's Mean, It's Green, It's the Mystery Machine', the gang is baffled when the Mystery Machine comes to life and starts to drive itself. Eventually the clues lead them to the Mystery Kids who used to own the machine. In 'Riva Ras Regas', a trip to see their favourite pop singer in concert at a Las Vegas theatre turns into a ghost hunt when the theatre turns out to be haunted.