Alex Kingston's much loved and integral character River Song seemingly met her end in the Series 7 finale Name of the Doctor, and whilst it seems we will have to wait a bit longer for any return in the Twelfth Doctor's reign, River Song will be having new adventures in several upcoming audio stories.
Doctor Who: Doom Coalition 2 will see River joining up with Paul McGann's Eighth Doctor, likely before her (temporary?) goodbye. These adventures will then continue in The Diary of River Song in 2016, a 4 hour journey searching for ''the secret rulers of the universe''.
Whilst no return to TV appears imminent for Alex and River, showrunner Steven Moffat has gone on record having stated “[The return of River Song will] now be story-driven. If we’ve got an idea that she fits perfectly then there’s no reason why we can’t do it, but I quite liked where we got to at the end of ‘The Name of the Doctor’, with him saying goodbye to her. So we’ll see''. These latest adventures are the strongest indication yet for a burgeoning interest in the character's return.