The Curse of Peladon The TARDIS takes the Doctor and Jo to Peladon, a planet that has applied to join the Galactic Federation. However, someone is determined to prevent this happening at any cost! The Sea Devils The Doctor discovers that numerous shipwrecks have been caused by aquatic creatures who are colluding with the Master to take over the world. The Mutants In the far future, the planet Solos is about to be granted independence after years of Earth rule. However, the governing Marshal is unwilling to relinquish his position of power. The Time Monster The Doctor pursues the Master to ancient Atlantis in a bit to prevent him summoning the all-powerful Kronos.