Out Again, in Again (1948)

A few weeks before this epic was released, the two magpies had starred in 'Free Enterprise', a cartoon that ended with them both in prison. 'Out Again, in Again' begins like the latest chapter of a serial in progress, with a nasal-voiced narrator informing the audience that "in our last episode" Heckle and Jeckle were in prison, and then picking up the action from there.