The most defining relationship in the series is the one between Lieutenant Columbo and his wife, who is famously never seen The "Invisible" Wife: Mrs. Columbo
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Throughout the series, Columbo had several romantic interests, but these storylines were often subtle and played for comedic effect. One notable example is his relationship with the actress in the episode "Murder Under Glass" (Season 7, Episode 2). Columbo's infatuation with the actress was evident, but it was clear that she was not interested in him romantically. The most defining relationship in the series is