Get Smart (1965)

S1E24 Stakeout on Blue Mist Mountain

A group of KAOS operatives is en route to Washington, each transporting components of a bomb intended to detonate near a U.S. military installation. Max and the Chief manage to apprehend one of the agents and extract vital secrets from him. Their investigation leads them to Blue Mist Mountain, where it's up to Agent 86 to neutralize the bomb before it detonates. His only assistance comes from Parker via the shoe-phone, a single coin, and an incredibly costly tie.