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What's On The Other Side?

Posted by John on October 20, 2009 at 21:23

In the U.S.A in the Seventies we would "change the channel" on our TV set when we wanted to watch another program; "Go to channel 7, there's a game on," etc...
In British television programs I always hear them asking "What's On The Other Side?" "There's a game on the other side," etc...

"The Other Side" in this instance, is another TV channel.

Can anyone explain the origin of "The Other Side" referring to another TV channel?