A major new cast member has joinedA Man on the Inside. The Netflix series, which was created by Michael Schur based on the documentaryThe Mole Agent, stars two-time Emmy winner Ted Danson as Charles Nieuwendyk, a retired engineering professor who, in season 1, takes a gig going undercover at a retirement home to find the culprit in the theft of a valuable necklace.A Man on the Insideseason 2was officially renewed in December 2024, just under a month after the premiere of the show’s debut season.

PerDeadline,Mary Steenburgen has joined the cast ofA Man on the Insideseason 2. The actor, who has been married to Ted Danson since 1995, will play a former musician named Mona Margadoff who is a major piece of the puzzle in the new season and may prove to be a possible love interest for Charles. Further details are being kept under wraps, but she will be playing a lead role in season 2, which follows a different case from season 1.

Mary Steenburgen as Carol smiling at a table in Book Club: The Next Chapter

What This Means For Mary Steenburgen

A Man On The Inside Season 2 Is A Change For The Star

Mary Steenburgen is a huge get for the series, as she is a well-respected star, having won an Oscar for her performance in 1980’sMelvin and Howard. Since then, she has taken on a wide variety of roles in notable projects. This includes starring in movies such as theBook Clubfranchise,Back to the Future Part III,Elf,Happiest Season,Four Christmases,The Proposal,The Help, and Guillermo del Toro’sNightmare Alley. She has also taken on major roles in the television seriesJoan of Arcadia,The Last Man on Earth, andZoey’s Extraordinary Playlist.

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While she is best known for her roles opposite other actors, Steenburgen has appeared alongside her husband in a variety of projects over the years. This includes co-starring in the single-season seriesInkand making guest appearances in his showsThe Good Place(which was also created by Michael Schur),Becker,Mr. Mayor, andBored To Death. However, her joining theA Man on the Insidecastmarksthe first time that she has held a longer-running television role opposite Danson since the late 1990s.

The cast of The Book Club raise glasses on the poster for The Next Chapter

Our Take On Mary Steenburgen Joining A Man On The Inside

Mona Margadoff Could Be A Major Suspect

Theseason 1 finale ofA Man on the Insidedid not feature a major star being the culprit, as can sometimes be the case in the fellow mystery comedy seriesOnly Murders in the Building. However, this could mean that the show will switch up its approach in season 2 in order to keep audiences on their toes. Thus, Mona Margadoff could very well be a major suspect in the new season, andher position as a potential love interest could make her motives even more suspiciousonce more details are known about her character.

A Man on the Inside

Cast

A retired professor finds renewed purpose when enlisted by a private investigator to go undercover in a San Francisco retirement home. The series unravels the mysteries and intrigues within the community, blending suspenseful investigation with the complex dynamics of aging and secrecy.

Mary Steenburgen looking disturbed in The Last Man on Earth

Man on the Inside TV Show Poster