All that I can remember of this dream is that part of the dream involved The United Kingdom (UK) making a face mask law that required citizens to wear masks most of the time because of the COVID-19 pandemic I assume, except when eating and drinking et cetera, and you even had to wear a face mask when swimming et cetera; but that is all that I can remember of this part of the dream.
The second part of the dream took place during the day and I was in the alley where the pet cages are outside my parents yard when I saw something running in the left corner of my eye in the yard of the house that my former male classmates SW & EW used to live in, and it jumped from that yard over that fence over the alley that I was standing in and over my parents tall hurricane fence into our yard near where my brothers TDC & KDC park their automobiles.
It was an impossibly long jump, I turned to see that it was an unknown dog, it immediately started chasing some of our cats, and so I ran into the yard to grab the dog.
I grabbed the dog, it did not put up a fight, then my brother GC walked outside, I explained the situation to my brother GC, and he probably tied the dog up and was going to try to find its owner; but that is all that I can remember of this part of the dream.
The last part of the dream started like a movie that took place inside a one-story house or building that looked like it was still under construction or remodeling or it was abandoned.
There was a woman with either dark-light color or light-medium color skin who seemed to be time traveling back and forth from the future back to the past.
She was trying to stop an event or two events that happened in the past where a man, maybe her boyfriend or husband or some man very close to her died I assume, and maybe something catastrophic / apocalyptic happened as well to Earth that was somehow either connected to his death or just happened to happen that same day.
The woman used a device that looked like a black plastic trash can where the top was curved like the edges were melted a bit that caused them to curve inward somewhat, inside of it was a liquid that looked mostly like water, in the middle of the water was a circular metal piece in the middle that was connected to maybe a spring like a small pressure plate or something that pushes down when you step on it to activate the machine, and the trash can-like thing was inside either another trash can-like thing that looked normal & not partly melted or it was a thing that you could pull up around it like something that you pull up for privacy or something.
The woman would jump in the middle of the water inside the trash can-like device to push down the pressure plate-like thing, and that seemed to take her back in time to a particular moment shortly before the man died and the big disaster or whatever happened on Earth.
She wanted to undo one or both of these events, some reason the device only took her back to that same moment, and so she only had a very short time each time to try to change what happened that day; but she kept failing, and then she would time travel back to the future.
I remember the woman being emotional and crying sometimes, just briefly being able to see the man really made her emotional, the time that she had to try to change the past was so short that she often did not even get to reach the man in time, and at some point when the woman was in the past my brother GC and I somehow entered the building where her time travel device was.
There is a chance that her device was in the present and not her future, so there was possibly that past and present and future in this dream, but I am not sure.
We assumed that her future must have been pretty bad or something for her to keep trying to change the past, I remember trying to use her time travel device, I stood on top of it as GC pulled up the privacy-like thing around it where you could not see me unless you were tall enough to look over it, and then I jumped into the water to push the pressure plate-like thing to activate the machine.
I told GC to then look to see if my body was gone and then keep watching to see where I return, I am not sure if it worked because as soon as I pushed the pressure plate-like thing down to activate the device, everything went black, and I woke up in the real world.