I think it should be "It was in London that he met his wife". The other sentences that you quote would not normally be natural English. Normally one would say "It's my wife (who(m)/that) I'm angry with" and "It's the TV show (that) she's crazy about".
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Russkiy BearIt's from London that I am. Would that be correct?Yes, it's theoretically correct, but it sounds strange.
Russkiy BearI know it's not how people usually say something like that but I'm asking about cleft sentences and the way they work.I think you understand the
CalifJimIt is his wife that Jack is angry with. (weird!)I actually find that sentence quite acceptable.