Q.Christmas Cactus
I made the horrible mistake of leaving my Christmas Cactus outside ONE day too long and it froze up one night. It was almost 20 years old. 🙁 All the branches dried up and fell off. Is there ANY chance it will come back? Is there anything I can do to help it?

Certified GKH Gardening Expert
There is nothing you can do to help recovery except to bring it in, and keep it from the cold. It does not handle cold very well as you have, unfortunately found out. It may recover just fine, but it may also lose a lot of its pads. I don't think it is dead. But it is very injured.
Here is an article that will help: https://www.gardeningknowhow.com/ornamental/cacti-succulents/christmas-cactus/christmas-cactus-cold.htm