This is one of over 400 episodes of "Studio One in Hollywood"--a live anthology series that was on TV from the late 1940s through the 1950s. Most of the shows, as far as I know, are no longer in existence, though some of the shows (including a few famous ones) have been released on DVD. Interestingly, Betty Furness' commercials for Westinghouse appliances are included on the DVDs--making the Kinescope recordings play like you were watching them back in the good old days.
"Summer Pavilion" is an hour-long teleplay starring Miriam Hopkins, Elizabeth Montgomery and Charles Drake. Hopkins plays an overbearing matriarch of a faded upper-class Louisiana family. Despite the family's financial straits, she is adamant in her refusal to let go of her social class and its antiquated ways. When the show begins, she is beside herself at the imminent destruction of a rotten old gazebo that did belong to the family but is now on a plot of land they have sold. Despite no longer owning the property, Hopkins is insistent that they leave the gazebo intact. And, because of this, she hates the agent (Drake) who is working on the project.
As for Drake, he is quite taken by Hopkins' daughter (a young Elizabeth Montgomery) and asks her out on a date. However, she is engaged to an upper-crust guy who her mother adores (mostly because of his standing--as he is a bit of a dullard). When they do sneak off, Hopkins is vexed but soon realizes she can't do much about it. What will happen next? Well, see this charming live-action show to find out if you are so inclined.
As for the acting, it's quite good, though I thought Hopkins' performance was a bit broad. Whether this was her fault or that of the writer (Gore Vidal) is beyond me--but her character seemed a tad like a caricature of the Old South at times instead of a real person. But, as the rest of the show was very good, I have no major complaint. The plot, though simple, was lovely and exudes quality throughout and I strongly recommend it. It's a real shame that they don't do live TV like this any more.