I got a two-parter on the same night!
Part I started off with the mysterious disappearance of a little girl (I think) in London, the last in a series of disappearances with no logical explanation. Something was off, so experts were brought in to assist directly by order of the PM of the UK (who was a lady whose face I found familiar, but definitely wasn't Theresa May)..I was one of the experts, though I couldn't tell you what of.
We started our investigation and quickly uncovered a sinister angle to it. It would appear that the missing people were being sucked into some sort of a cavernous, hellish world, with the lines between us and "hell" occasionally blurring and opening a portal. At one point I got given a Range Rover (with the wheel on the right) that I didn't feel very comfortable driving; afterwards, the investigation led us to an unnamed banana republic. The friendly dictator of the banana republic got involved and was helping us throughout.
The other experts were several rather different people, which of course led to "clashes of personalities", but the only one I remember properly was an irritable, athletic young woman with a short temper, who may or may not have been a "dimensional physicist". Though we couldn't really stand each other to begin with, we gradually warmed up to each other over the course of these harrowing events, and eventually fell in love.
In the end, we managed to close the portal (it was in the banana republic), but the missing people could not be retrieved and were presumed dead. Me and my new girlfriend drove off in the Range Rover -- I let her drive, since I didn't really want to, which was a great mistake, as she found great joy in putting the pedal to the metal at all times, including inside cities. Right at the end, I almost got us in a crash, as I started kissing her whilst she was driving. God, my dreaming self is stupid...
The sequel, Part II, took place a couple of years later, but most of the principal characters were the same. My wife and I (we'd married recently) were in the banana republic, and the dictator was persuading us to build a villa there. We weren't that certain. This tranquil existence was interrupted by a call from the PM of the UK, asking us for aid again. Apparently the portals had opened again (and there'd never been one single portal to begin with!), but this time some guy had escaped from hell. We rushed back to London and found the guy, who'd lost his right hand. He told us of what this hell was like, but apparently there were circa 300 people living there in squalid conditions. The path to escape was extremely dangerous, and he was the first one to make it out alive. After a couple of sub-plots that nobody really seemed to care about (including one about the numbers "6" or "666" being something related to something about these portals), we decided we have to go to hell and close the portals from there, so we gathered the few people we'd selected for the expedition and went to the Russian embassy in London -- you see, the Russians had had a dimensional "blurring" open in their basement, but had managed to stabilise it, because they had a secret high-tech lab there. In front of the basement, we found two women, who were talking about 666 and were begging us to take them with, so they can help and end this hell (one of them had green skin and a weird hat, because she was apparently a "goblin"). I'd seen the résumé of the film, so I knew that we were missing these two ladies, and we took them in. Then the PM knocked on the door of the embassy...
And I woke up. *sigh*...