Jim Bob's been a little out of control lately, but after narrowly escaping a car-fixing accident, he pulls himself together and decides to become a preacher. He's not the first Walton to take this path - Erin did the same thing in 'The Burnout' - but he does come across as remarkably sincere.
Meanwhile, there's an excellent subplot in which Elizabeth collects bugs for a school science project, much to Erin's disgust. The moth she captures may be hopelessly fake, but the crickets certainly aren't. The scene where they escape in the bedroom is superb. They should do this kind of mayhem more often.
Walton's Mountain is certainly getting through its ministers. Hank was still in charge in Dec 1941, while the reference to the fall of Singapore places this episode in Feb 1942, making Reverend Bradshaw the third vicar we've seen in as many months. Goodness knows what happened to Andy March. It would have been nice to have seen him more than once.
But this episode belongs to Jim Bob, who is adorable throughout. His scenes with Esther, in particular, are some of his best of the whole series. If you've seen or read 'Spencer's Mountain', then you'll recognise the part where he tries to enrol on a preaching course and is told he must first learn Latin. It's Clay-boy all over again.