Who Killed the Cat? (1966)

When the owner of a boarding house dies, he leaves his modest property empire to his daughter under the care of her jeweller uncle "Henry" (Mervyn Johns) and her stepmother "Ruth" (Ellen Pollock). Turns out the stepmother is every bit as wicked as stereotype suggests - and soon she decides to send the daughter out to work and to up the rent for the three elderly lodgers who live with them - safe in the knowledge that they could never afford it. One of these ladies has a kitten that has an habit of getting into rooms he's not allowed in, and when he is found dead the old ladies assume he has been poisoned, and set a trap for the supposed murderess. When the matronly landlady is discovered dead in her bed shortly afterwards, all eyes point to a bottle of whisky, a jug of water and, well, just about everyone, really... It falls to Conrad Phillips ("Insp. Bruton") to get to the bottom of things. It's quite a cleverly layered little mystery this, the three old ladies reminding you of Katie Johnson, and the ending is certainly not what I was expecting. Mary Merrall ("Janet") overacts dreadfully as the daughter, and her scenes do spoil it a bit, but for the most part it's an agreeable, well and amusingly paced amalgam of stories that I rather enjoyed.