Other mistake: Near the end, after Fred says, "If you take my hearing, you might as well take all of me, " Lamont turns off the lights by flipping the light switch up. A moment later, Lamont turns the lights back on by also flipping the light switch up.
Sanford and Son (1972)
1 mistake in A Matter of Silence
Starring: Redd Foxx, Demond Wilson, Don Bexley, LaWanda Page
Genres: Comedy
Officer Hopkins: When we're finished, people will be able to walk down the streets safely in Los Angeles.
Fred Sanford: Yeah they can walk in Los Angeles, but they'll still be running in Watts.
Trivia: Throughout the series, a number of times Fred mentions "Pluto water." It was a popular strongly laxative natural water product that was sold until 1971, when production and sales halted because lithium, one of the mineral salts, was declared a controlled substance. Sanford and Son debuted in 1972, so Fred couldn't have had this product throughout the series.