The Doctor’s granddaughter, Susan Foreman — her surname may be an alias or a fan-retcon — was a gifted young girl who bravely joined her granddad on a number of adventures until finally he’d seemingly had enough, stole one of her shoes and abandoned her in post-apocalyptic London to become the wife of a dude she’d only just met. Don’t judge! Every family has its weird stories.
Barb engages in some harmless grave robbery and is mistaken for an Aztec god. Romance and adventure ensue!
The Doctor & Co arrive on Marinus and are blackmailed by Arbitan to go on a suicide mission to retrieve the five titular micro-circuit keys.
The Doctor & Co go on a road trip to Peking with Marco Polo. Meanwhile, a man by the name of Tegana is plotting to steal the TARDIS.
The TARDIS suddenly stops and The Doctor, Susan, Ian and Barbara must face their fears and figure out what’s happened.
The Doctor, Susan, Barbara and Ian arrive on the planet Skaro, where war has been raging between the Thal and the Daleks for 500 years.