i've never much cared for tommy and tuppence in the books but in the tv series (of which i have seen half an episode) they're so daft, incompetent, woolly and farcical i can't help breaking up sometimes. some moments:

tommy: (getting excited) you mean the major goes out in the morning with an empty suitcase and comes back in the evening with it crammed to the gills full of forged bank notes and having trailed him hither and yon i catch him in the act?
inspector: well, i don't think it would be that easy, sir.
tuppence: i think my husband was speaking allegorically.
tommy: metaphorically.

*

inspector marriot: it's a well known fact that my chaps at the yard are fearless, strong as oxen and make first-class husbands.

*

tommy: we're out to get the crackler!
tuppence: and what exactly is a crackler when he is at home?
tommy: he isn't very often. it's a word i've just invented. he's a chap who forges bank notes and puts them into circulation. they crackle, so he's a crackler.

anyway, you see what i mean.