If memory serves, 1961 was about the time tabloids started titillating readers with reports of "wife swapping" in the affluent suburbs. This episode doesn't go that far, but it does involve infidelity among young professionals. Bish (Best) and Elise (Van der Vlis) may be married to others, but that hardly dampens their mutual attraction. Nor are they very discreet about it, embarrassing their respective mates in front of others. We know something's going to explode, but what. After all, these are upscale folks with bright futures.
Average episode, but 'average' for Hitchcock means solidly entertaining. There's something of an unexpected twist, plus a convincing turn from Brando's sister Jocelyn that adds credibility. I also like the well designed livingroom that suggests young, style-conscious affluents. The script also makes good ironical use of the folk ballad "Barbara Allen". Generally, it's a suspenseful, but unmemorable 30 minutes. (Be sure however to catch Hitch's appropriate opening and closing.)