When you watch Doctor Who Season 10 Episode 10 online, the Doctor, Bill, and Nardole stop by NASA just in time to see telemetry come in from a probe on Mars, revealing something quite surprising in the polar ice: a message clearly spelling out "God Save the Queen." Naturally curious, the trio decide to investigate the source of the curious message. When they arrive, however, Nardole is accidentally trapped when the TARDIS vanishes back to Earth without explanation. The Doctor and Bill, now on their own, soon encounter something unexpected: a troup of Victorian soldiers. And with them is an Ice Warrior, who they nicknamed Friday, after the character in Robinson Crusoe. According to the soldiers, the Ice Warrior crashed on Earth some time ago, and they saved his life. In return, he brought them back to Mars, ostensibly to dig up riches in repayment of the debt. But the Doctor, ever canny, suspects that the Ice Warrior is not telling the whole truth, or perhaps any of it, and he's certain that there's something more in play beneath the surface of Mars. Will they dig up the truth? Find out what happens when you watch Doctor Who Season 10 Episode 10 online!