Classic Doctor Who Season 21 Episode 15 Planet of Fire: Part 3

The third and final part of the Planet of Fire begins with Perry stuck on the planet Sarn, where she ends up exploring the hidden caverns beneath the surface with Malkon, the leader of the Sarns resistance. Meanwhile, the Doctor and Turlough are on their way back to Sarn, not realizing that the Master has hitched a ride on their TARDIS.

As Perry and Malkon explore the caves, they come across a chamber with a strange glowing crystal, which turns out to be the key to the planet's destruction. With the Master's help, the Sarns plan to use the crystal to ignite the planet's molten core, creating a massive explosion that could wipe out life on Sarn and potentially spread throughout the galaxy.

The Doctor and Turlough race to find Perry and stop the Master before it's too late. But they face numerous obstacles along the way, including a fight with the Master's savage right-hand man, Kamelion, and a tense confrontation with the Sarns. Eventually, the Doctor discovers the true origin of the crystal and uncovers a deeper conspiracy that has been brewing for centuries.

The final showdown takes place on the planet's surface, with the Doctor and his companions facing off against the Master, Kamelion, and the Sarns. With the fate of an entire planet and potentially the fate of the universe on the line, the stakes have never been higher.

Planet of Fire: Part 3 is a thrilling conclusion to a multi-episode story arc that features some of Doctor Who's most iconic villains and dramatic moments. With stunning special effects, memorable performances from the cast, and plenty of twists and turns, this episode is a must-see for any fan of classic sci-fi television.