Steptoe and Son Ride Again (1973)

Albert Steptoe and his son Harold are junk dealers, complete with horse and cart to tour the neighbourhood. They also live amicably together at the junk yard. Always on the lookout for ways to improve his lot, Harold invests his father's life savings in a greyhound who is almost blind and can't see the hare. When the dog loses a race and Harold must pay off the debt, he comes up with another bright idea: collect his father's life insurance. To do this, his father must pretend to be dead.