Watched "The Sunningdale Mystery" from the Tommy & Tuppence series Partners in Crime. Make-up improving--more subtle. More dresses, more hats, more period decor. A queer lapse in continuity, though: a dresser mirror inside a hotel bedroom has a lovely crown designed like calla lilies, and a few shots later the mirror is completely different.
This episode is unusual in that Tommy and Tuppence solve a murder mystery with only newspaper articles to go on, without meeting and interviewing the victim's relatives, the suspects, and the witnesses.