Hi Al,
They don’t look great it must be said but one or two look like they might recover.
They look to be about 2 weeks old? I think I would bring this batch into the heat and see what happens over the next week or so and also, late and all as you are, I would start a new batch. If you resow now they will be ready to go outside around 16th June to harden off before planting in final position so you wont have lost too much time really.
You should always keep Tomato seedlings/plants in a frost free area, Polytunnel/Greenhouse/House, until last Frost has gone.
Don