"Doctor Who: Joy to the World" continues the veteran sci-fi show's two-decade run as a Christmas TV institution. The Time Lord has been a fixture of the BBC's festive schedules ever since 2005's "The Christmas Invasion", and this year is no different.

The last time we saw Ncuti Gatwa's Doctor, he'd just defeated Sutekh and left companion Ruby Sunday back on Earth to get to know her recently discovered birth mother. Now traveling solo in the TARDIS, the Doctor pays a visit to the Time Hotel, where guests can open doors to any period in history. And dinosaurs.

Joining Gatwa for this year's festive adventure is "Derry Girls" and "Bridgerton" star Nicola Coughlan, whose titular Joy gets far more than she bargains for when she checks in for a holiday break. "Who" fans will also be excited by the return of former showrunner Steven Moffat, who's back on writing duties for this year's Christmas special, having also scripted the excellent "Boom" earlier this year.

This guide explains how to watch "Doctor Who: Joy to the World" wherever you are in the world on Christmas Day -- though we'll admit its reach stops just short of the entirety of space and time.

If you're a UK resident abroad right now, you can still watch "Doctor Who: Joy to the World" for FREE on BBC iPlayer. Unfortunately, geoblocking restrictions mean that iPlayer doesn't work outside of the UK, but a VPN can solve that problem...

Downloading a VPN allows you to stream your favourite content from anywhere. These simple pieces of software can change your IP address, allowing you to access on-demand content or live TV just as you would at home...

Take a sneak peek at what you're getting for Christmas with the "Joy to the World" trailer...