9 minutes, 35 mm, colour, 1981
Classical cartoon animation Audience: family Commentary: off screen
Producer: KF a.s. - Studio Bratri v triku Director: M+B+D (Macourek, Born, Doubrava) Designer: Adolf Born
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.