Oběť pro kamaráda (E11)

The ninth episode of the series "Mach and Sebestova". The schoolmates hear the horrible news - Mrs Kadrnozkova sold Jonatan, their faithful dog friend. Mach and Sebestova, with the help of their magic receiver, change the dog and themselves and, with an detective-type plot, they get Mrs Kadrnozkova to buy Jonatan back. (official distributor synopsis)