The ex-spook in question is Kelly Buffenbarger (not her real name), who recently showed participants, including the Post’s John Kelly, the ease with which one can transform his or her appearance on the fly with a quick trip to CVS.

Kelly said agents in the field are issued disguise kits, but in an emergency you can whip up something from the aisles of a drugstore. Hair dye, mascara, a sling and shoe inserts can help you lose a tail.

You’re asking yourself: shoe inserts? A big part of pretending to be someone else is remembering that you’re someone else. If you want to change your look, why not change your entire carriage with a limp. And to remind yourself that you limp, stick an insert in one shoe.

Intro to Espionage isn’t the only experience offered by SideTour. In fact, the balance are nowhere near as cloak-and-dagger: “Experience an Urban Produce Farm with the Head Grower,”
“Create and Decorate Artisanal Bitters Kits for the Holidays” and “Experience a Wine Tasting with DC’s Only Master of Wine.”

For something a bit more high octane, consider “Test Drive Tesla’s Newest Fully Electric Model S Car.” Each experience falls in the $35-$80 range. To sign up, visit SideTour’s Web site.

John Kelly: An undercover experience, for a price