doctor who jenna louise coleman matt smith name of doctor 'Doctor Who' finale photos: Season 7 episode 13 'The Name of the Doctor'The “Doctor Who” finale promises to reveal the Doctor’s “greatest secret” and from the episode title alone — “The Name of the Doctor” — we may some idea what that is. Or not.

Either way, we do know from these advance images that River Song (Alex Kingston), Dr. Simeon/The Great Intelligence (Richard E. Grant) and detective trio Madame Vastra, Jenny and Strax will all return for the big conclusion. And the mystery surrounding Clara will also find some sort of resolution.

We’ll return to the Doctor’s home planet, Gallifrey:

doctor who finale gallifrey 'Doctor Who' finale photos: Season 7 episode 13 'The Name of the Doctor'And piece together the puzzle of Clara…

doctor who clara oswin oswald jenna louise coleman 'Doctor Who' finale photos: Season 7 episode 13 'The Name of the Doctor'
doctor who clara season 7 finale 'Doctor Who' finale photos: Season 7 episode 13 'The Name of the Doctor'
doctor who jenna louise coleman clara name of doctor 'Doctor Who' finale photos: Season 7 episode 13 'The Name of the Doctor'
Doctor Simeon brings along new villains the Whispermen:

doctor who richard e grant name of doctor finale 'Doctor Who' finale photos: Season 7 episode 13 'The Name of the Doctor'While the Doctor and Clara have Madame Vastra, Jenny and Strax:

doctor who clara jenny strax vastra name of doctor 'Doctor Who' finale photos: Season 7 episode 13 'The Name of the Doctor'And River Song:

doctor who river song alex kingston name of doctor finale 'Doctor Who' finale photos: Season 7 episode 13 'The Name of the Doctor'The “Doctor Who” Season 7 finale “The Name of the Doctor” airs Saturday (May 18) at 8 p.m. ET on BBC America.