to you
@younggardengrower I think your tomato plants are most likely dead, even though the fruits didn't freeze. They won't ripen now that the leaves are dead - the leaves are what 'collects' the sun for the plant and makes the sugars that go into the fruit. So you should harvest your tomatoes now, and start some more seeds right away. Then put an alarm or reminder on your phone to tell you when it's going to get too cold at night for your tomato plants, and that way you'll remember to throw a blankie on them for the nights. Don't use plastic, use something made of fabric and tent it with the edges weighted down, so that it will trap the heat coming up from the warm ground.
As far as hybrid seeds coming true, once the hybrid is stable, (before it is released for sale, usually) it may produce new plants from seed that are true to the breed. But it may not. We did have a discussion about cross-pollination of tomatoes a few months ago, and *as I recall* Dave told us that the cherry types are more promiscuous than large-fruited tomatoes, so they will cross with other plants easily. But the large-fruited ones don't get crossed so often.
Glad I harvested tomatoes yesterday, my garden is a bit of a mess today from all the high winds we had. Happily, the front went racing by in about 20 minutes, dropped an inch or so of rain, and didn't cause any tornadoes here. Phew! Cool, sunny and beautiful today, more rain expected on the weekend.
I'm just gonna blame it on getting old 
But as my husband says, "It's ok, the profits are going to a good cause". I just checked and so far in the tomato seed swap, I have won 8 packages of seeds from Dave, so that's a pretty big discount! 
