This is a very peculiar episode of "Four Star Playhouse". For one thing, the show alternated four top movie stars in the leads of each episode (who the four are did change over time) and this is the only one with TWO stars in it, as David Niven does a small cameo near the end of the show...even though it already starred Charles Boyer (two of the four stars). And the show also appeared to be a murder mystery...and at the end became a comedy quite unexpectedly! Overall, it is one of the more delightful episodes...so being peculiar is very good!
Jacques (Boyer) is troubled. His old friend, Mr. Hallerton, wrote him a disturbing letter...and soon died after writing it! In the letter, Hallerton wrote that his wife "will be the death of me"....and he was dead only weeks later! Jacques is intent on learning if Mrs. Hallerton is a killer. Instead, he is shocked to find her to be very nice and kind. Soon, she insists that he stay in his friend's old studio. After all, the friend was an artist and Jacques has always dreamed of being a famous writer...so it's like having another artist in the house. Where does all this go? I won't say as it would ruin the fun.
In addition to Boyer and Niven, Angela Lansbury plays the wife...so it's a real star-studded show. Well written and clever...if you want to see this and other episodes of this excellent series, go to archive.org where you can download or just watch them for free.