Bridget Moynahan - RTR3BFN4
Actress Bridget Moynahan arrives for the premiere of Les Miserables in New York, December 10, 2012. REUTERS/Carlo Allegri

"Blue Bloods" starring Bridget Moynahan (Erin Reagan), Steve Schirripa (Anthony Abetemarco), Will Estes (Jamie Reagan), Donnie Wahlberg (Danny Reagan) and Tom Selleck (Frank Reagan), will have an upcoming episode titled "Foreign Interference." It will feature a case with tampered evidence that Erin and Anthony are working on. Check out the latest "Blue Bloods" episode guide.

Spoiler alert: This update contains more 'Blue Bloods' spoilers. Read on at your own risk.

"Blue Bloods" Season 7, episode 21, "Foreign Interference" will show Anthony and Erin scrambling to find out who tampered with the evidence in one of their cases, according to a CBS press release. Meanwhile, Frank will also work on a sensitive case that involves Archbishop Kevin Kearns (Stacy Keach). As for Danny and Det. Maria Baez (Marisa Ramirez), they will work with two Russian operatives as they hunt for a dangerous Russian man who was able to enter the US using a diplomatic visa.

'Foreign Interference' guest stars

John Behring directed the "Blue Bloods" "Foreign Interference" episode while Peter Blauner wrote it. Guest stars of this episode include Joel Van Liew (Simon), Lyanka Gryu (Anya), George Olesky (Alexei), Nick Klementowicz Iii (Sergei Karenin), Evander Duck, Jr. (Judge Joel Mccarthy), Mark Linn-Baker (Carlton Miller), Joe Naples (Court Officer), Brian Knoebel (Towel Boy) and Tim Moriarty (Priest).

Donald Paul (Asad Abdullah Tuur), Abraham Makany (Sam Kouhry), Paul Borghese (Manager), Tim Barker (Sgt Mulhearn), Steven Skybell (Gary Falk), Zdenko Martin (Det. Lev Vronsky), Lev Gorn (Det. Arkady Levin), Yelena Shmulenson (Natasha), Tamara Tunie (Monica Graham) and Santo Fazio (Mickey), will also be appear in this episode.

'Blue Bloods' episodes

"Foreign Interference" follows the show's previous episode titled "No Retreat No Surrender," which was aired on April 14. It featured Erin helping out a witness from one of her cases in the past. Baez and Danny also investigated a case that involves a suspicious suicide. Meanwhile, Frank had to deal with the Mayor's office and a potential misconduct. The next episode is titled "The Thin Blue Line," and it will air on May 5.

'Blue Bloods' cast 2017

The police procedural drama's 21st episode will feature the other cast of "Blue Bloods" such as Sami Gayle (Nicky Reagan-Boyle), Amy Carlson (Linda Reagan), Vanessa Ray (Officer Eddie Janko) and Len Cariou (Henry Reagan). Recurring cast members including Tony Terraciano (Jack Reagan), Gregory Jbara (DCPI Garrett Moore), Abigail Hawk (Abigail Baker), Andrew Terraciano (Sean Reagan) and Robert Clohessy (Lt. Gormley), will also make an appearance.

"Blue Bloods" airs in the US every Friday from 10-11 pm EST on the CBS TV Network. "Foreign Interference" will be aired on April 28. The show airs in Australia every Thursday at 10:30 pm on TEN.

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