Can anyone work out the chronological order of his appearances, though? Were the flashbacks before or after Mysterio?
* Husbands Of River Song: meets Nardole, spends 24 years with River.
* The Return Of Dr Mysterio: having rebuilt Nardole, he goes on adventures with him. At some point, they are separated.
* Flashback: Nardole returns, helps the Doctor get into the Vault.
* Series 10.
You can't have the flashback before Mysterio because then we're straight into Vault territory when Nardole won't let him go places. So Nardole joins the Doctor for Doctor Mysterio then leaves him but is with River Song who gives him the orders but then he leaves River Song to return to the Doctor and makes him stay to guard the vault? But River Song is dead in Doctor Mysterio...
... is that right?
* Husbands Of River Song: meets Nardole, spends 24 years with River.
* The Return Of Dr Mysterio: having rebuilt Nardole, he goes on adventures with him. At some point, they are separated.
* Flashback: Nardole returns, helps the Doctor get into the Vault.
* Series 10.
You can't have the flashback before Mysterio because then we're straight into Vault territory when Nardole won't let him go places. So Nardole joins the Doctor for Doctor Mysterio then leaves him but is with River Song who gives him the orders but then he leaves River Song to return to the Doctor and makes him stay to guard the vault? But River Song is dead in Doctor Mysterio...
... is that right?