[b]Much outdoor footage (some with Lee Marvin) for M-Squad was filmed in Chicago BUT all the indoor scenes were filmed in studios in Hollywood. Only current show featuring Chicago cops is that inane Mike And Molly sitcom. :)-D[/b]
In one episode.. possibly the shows ending wrap-up... Lee is see walking in front of a used car lot. Its still there ... S E corner Diversey and Cicero.