Four Russian spies, three of them now in custody, posed as Canadians while on "deep-cover" assignments in the U.S. And their techniques? Invisible ink, buried cash and bag swaps. How big of a problem is espionage in Canada? We find out from an intelligence specialist.

Following their appearance at the TedX conference, filmmakers Ted Hardin and Elizabeth Coffman are on the show. Their documentary "Veins In The Gulf" focuses on the disappearing coastline of southern Louisiana.

The CFL has announced a new drug-testing program. Glen Kulka, a former CFL player who admitted to steroid use during CFL playing career, joins us this evening.

Plus, an ode to the G20 fence and of course, Mark's disconnect for the day. Tune in, 8:00 p.m. ET live.