With two weeks of back-to-back "Agent Carter" episodes coming up, ABC has released synopses for episodes 6 through 9 from the Marvel show's sophomore season. The summaries reveal that a number of familiar faces will appear on the show as well as a few unexpected ones.

February 16 will see two episodes, "Life of the Party" and "Monsters" air back to back. These episodes look to promise more conflict between Peggy Carter (Hayley Atwell) and Whitney Frost (Wynn Everett).

February 23's two-hour block will include the episodes "The Edge of Mystery" and "A Little Song and Dance." The latter's title is appropriate as the episode will feature a dance number from "Dancing with the Stars" dancers Louis van Amstel, Dmitry Chaplin, Damian Whitewood, Sasha Farber, Anna Trebunskaya and Karina Smirnoff. Additionally, that two hour block may contain the return of Howard Stark (Dominic Cooper) to the show and it will feature the first season two appearance of Carter's season one best friend Angie Martinelli (Lyndsy Fonseca).

Episode 2.06: "Life of the Party"

"Life of the Party" - When Peggy realizes she cannot save Wilkes on her own, she turns to her most unexpected adversary for help while Whitney makes a move to control the deadly Zero Matter.

Marvel's Agent Carter stars Hayley Atwell as Agent Peggy Carter, Reggie Austin as Jason Wilkes, and Chad Michael Murray as Chief Jack Thompson.

Guest starring are Currie Graham as Calvin Chadwick, Lotte Verbeek as Ana Jarvis, Bridget Regan as Dottie Underwood, Kurtwood Smith as Vernon Masters, Josh Latzer as guard, Hayley McCarthy as Melody, John Kerry as Mortimer Hayes, Ray Wise as Hugh Jones and Casey Sander as Thomas Gloucester.

"Life of the Party" was written by Eric Pearson and directed by Craig Zisk

Episode 2.07: "Monsters"

WHITNEY FROST LEARNS OF POWER BEYOND HER WILDEST DREAMS, ON "MARVEL'S AGENT CARTER" ON ABC

"Monsters" - As Peggy plots a rescue mission, Whitney hunts for even more dark power; and Jarvis learns he should not make promises he cannot keep, on "Marvel's Agent Carter," TUESDAY, FEBRUARY 16 (10:00-11:00 p.m. EST) on the ABC Television Network.

"Marvel's Agent Carter" stars Hayley Atwell as Agent Peggy Carter, James D'Arcy as Edwin Jarvis, Enver Gjokaj as Chief Daniel Sousa, Wynn Everett as Whitney Frost and Reggie Austin as Jason Wilkes.

Guest starring are Lotte Verbeek as Ana Jarvis, Bridget Regan as Dottie Underwood, Christopher Allen as Agent Ryan, Kurtwood Smith as Vernon Masters, Ken Marino as Joseph Manfredi, Matt Braunger as Dr. Samberly, Arielle McFadden as nurse, Tom T. Choi as Doctor Chung and Myles Grier as man.

"Monsters" was written by Brandon Easton and directed by Metin Huseyin.

Episode 2.08: "The Edge of Mystery"

AGENT PEGGY CARTER MAKES A DEADLY DEAL WITH THE ENEMY, ON "MARVEL'S AGENT CARTER" ON ABC

"The Edge of Mystery" - Peggy and Sousa propose a trade with Whitney Frost, while the SSR gets help from Howard Stark that may be the key to eliminating Zero Matter, on "Marvel's Agent Carter," TUESDAY, FEBRUARY 23 (9:00-10:00 p.m. EST) on the ABC Television Network.

"Marvel's Agent Carter" stars Hayley Atwell as Agent Peggy Carter, James D'Arcy as Edwin Jarvis, Enver Gjokaj as Chief Daniel Sousa, Wynn Everett as Whitney Frost, Reggie Austin as Jason Wilkes and Chad Michael Murray as Chief Jack Thompson.

Guest starring are Lotte Verbeek as Ana Jarvis, Lesley Boone as Rose, Rey Valentin as Agent Vega, Kurtwood Smith as Vernon Masters, Brian Glanney as Agent Ford, Ken Marino as Joseph Manfredi, Tina D'Marco as Nonna, Matt Braunger as Dr. Samberly, Tom T. Choi as Doctor Chung, Russell Edge as Agent Blackwell, Tim Brown as snub-nose and Damian O'Hare as Nick Driscoll.

"The Edge of Mystery" was written by Brant Englestein and directed by Metin Huseyin.

Episode 2.09: "A Little Song and Dance"

PEGGY FACES SHOCKING BETRAYALS AS SHE CLOSES IN ON WHITNEY FROST, ON "MARVEL'S AGENT CARTER" ON ABC

Lyndsy Fonseca Guest Stars as Angie Martinelli, and the Episode Includes a Dance Number Featuring the Show's Cast and "Dancing with the Stars" Dancers Louis van Amstel, Dmitry Chaplin, Damian Whitewood, Sasha Farber, Anna Trebunskaya and Karina Smirnoff

"A Little Song and Dance" - Peggy desperately tries to save Dr. Wilkes with a dangerous plan to stop Whitney Frost. But Thompson makes a surprising move that could destroy them all, on "Marvel's Agent Carter," TUESDAY, February 23 (10:00-11:00 p.m. EST) on the ABC Television Network.

"Marvel's Agent Carter" stars Hayley Atwell as Agent Peggy Carter, James D'Arcy as Edwin Jarvis, Enver Gjokaj as Chief Daniel Sousa, Wynn Everett as Whitney Frost, Reggie Austin as Jason Wilkes and Chad Michael Murray as Chief Jack Thompson.

Guest starring are Lotte Verbeek as Ana Jarvis, Lesley Boone as Rose, Bridget Regan as Dottie Underwood, Rey Valentin as Agent Vega, Kurtwood Smith as Vernon Masters, Ken Marino as Joseph Manfredi, Matt Braunger as Dr. Samberly, Max Brown as Michael Carter, Tim Soergel as Paul, Bert Rotundo as Ralph, Lyndsy Fonseca as Angie Martinelli, Lon Gowan as truck driver and Russell Edge as Agent Blackwell.

"A Little Song and Dance" was written by Michele Fazekas and Tara Butters with teleplay by Chris Dingess and directed by Jennifer Getzinger.

"Agent Carter" airs on Tuesdays on ABC at 9 PM ET.