: Some reviewers at the Columbophile Blog consider it one of the series' "dreaded" adaptations, arguing it feels more like a generic police drama than a true Columbo episode.

: Plays the character Dorothea McNally ; her performance is often cited as a highlight, featuring a character very different from her usual roles.

: (Peter Falk’s real-life wife) appears as Geraldine Ferguson . Critical Reception

: Breaking his usual "bumbling detective" facade, Columbo dons various disguises—including an art thief and a mobster—to infiltrate a criminal conspiracy. Key Cast and Characters

: Unlike most episodes where the audience sees the murder happen at the start, "Undercover" is a traditional "whodunit" where the killer’s identity isn't revealed until the end.