"Night and The Doctor" 5 minisodes with River Song! The order is: Bad Night Good Night First Night Last Night Up All Night. Also on this site search "Doctor Who prequel" for other prequels, as well as "Pond Life"
She refers to him as "her thief." The TARDIS was amazing as a human using her temporary voice to tell him what he means to her. She was smart and brilliant: "I wanted to see the universe so I stole a Time Lord and ran away.