Tomato issues with brown spots and wilting plants

I think we may have several things going on with our tomatoes. First there are brown spots on some of the green tomatoes. The plant seems "wilted" even though it has had sufficient watering. We've already had some large wonderful tomatoes from the plant this

year and there are quite a few tomatoes on the plant now. I have attached several photos. Our other plant seems ok for now but worried this is going to spread. Thanks for any help!