Second Thoughts is a British comedy television programme that ran from 3 May 1991 to 14 October 1994. It was broadcast on the ITV network and made by the ITV company LWT. It was followed by a sequel, Faith in the Future. Second Thoughts followed the lives of two middle-aged divorcees, Bill MacGregor and Faith Greyshott, from very different backgrounds trying to develop a relationship, despite the pressures pulling it apart (namely Faith's two teenage children and Bill's devious ex-wife Liza, who works alongside him).

Second Thoughts was based upon the real-life relationship of the writers, husband and wife Jan Etherington and Gavin Petrie. It originally aired as a radio series on BBC Radio 4 broadcast between 1 November 1988 and 23 July 1992. The radio series consisted of four series and a Christmas special broadcast in 1992 with a total of 31 episodes. The radio scripts were used for the television series on ITV. The fifth series was the only series not to be based on the original radio scripts.

During the recording of an episode of series four, Lynda Bellingham was surprised by the This Is Your Life host Michael Aspel on set as she was to be the star of an episode of This is Your Life. Her co-star James Bolam was in on the surprise, and Lynda appeared truly shocked when Michael Aspel appeared on the set to present her with the big red book and to tell her "this is your life!" to the thundering applause of the studio audience.Second Thoughts ended on 14 October 1994, but has since been repeated on Forces TV. The original radio series was often replayed on BBC7, and continues to be repeated on BBC7's rebranded replacement, BBC Radio 4 Extra.