 A shoe phone of the sort depicted by "Get Smart" would almost certainly not have been possible in the era depicted by the show (1960s and 70s).When the Central Intelligence Agency announced that one of Don Adams' prop shoe phones would be placed on display at the CIA Museum, the agency dismissed any link to actual spy equipment and said shoe phones and other such gadgets were, "but fantasy precursors to today’s wireless communications".The most famous example of a shoe phone in fiction is that of the television show "Get Smart".