I can't speak for you folks up north of us, but I believe some stations here in USA are required to transmit via the airwaves, as are many radio stations. Your biggest issue may be finding an old set of "Rabbit Ears" to receive the signals sent over our airspace. I also think you'd be very lucky to find a rooftop antenna and rotor to spin it for best alignment.
Might I suggest http://www.hulu.com
? They have lots of the older shows and offer a free service (with commercials, just like TV) and have recently launched a paid, commercial-free option. Could be worth a look for you.
There is also a website called http://www.metv.com
that also airs the older "classics" but I'm not very familiar with it - although I believe gwynnie is. She may be able to tell you more.
Hope this helps