DetroitSquirreL

I saw this on TCM about a month or so ago. It was a movie with this team or a wife and husband and the husband was a detective/book buyer? And the main item in this movie is a copy of Shakespeare Script if I remember correctly that was stolen, they think its the 'bad' son who owes money. the couple that help the cops are in a few other movies together too. Please help me remember the name, I know its not available on DVD as I did look it up that day. Thanks in advance!