For Sunday's Season 3 premiere of "The Circus" on Showtime (8 p.m.), co-hosts John Heilemann, Mark McKinnon and Alex Wagner (replacing Mark Halperin) report from Moscow, St. Petersburg, London and Washington.

Details: The team interviews Margarita Simonyan, editor-in-chief of Russia’s English-language network RT, who's referenced 27 times in the U.S. intelligence report that found Putin ordered an influence campaign aimed at the U.S. election.

• The hosts challenge her on Russian interference in U.S. politics, troll farms and U.K. poisoning. "We are not North Korea," she says. "We are normal."
• The hosts also speak with U.S. Ambassador Jon Huntsman Jr.
• Back in the U.S., "The Circus" covers Mueller developments and Mark Zuckerberg’s congressional testimony.

YouTube clip from season premiere.