SolarmovieOne

Watch Doctor Who 2005 Season 6 Episode 5 online — it may be available on legal streaming platforms such as YouTube, Netflix, Prime Video, Hulu, Disney+, and others.

A solar tsunami sends the TARDIS hurtling towards a futuristic factory on earth where human doppelgangers are used to mine dangerous acid. A second wave hits and the 'Gangers' separate. They can remember every second of their 'originals' life and feel every emotion they've ever experienced.