River Song first appears in the "Doctor Who" 2008 series two-episode story "Silence in the Library"/"Forest of the Dead". This story was written by Steven Moffat. Here, she meets up with the Tenth Doctor (David Tennant) in the 51st century. She tells him that she is someone he will come to trust completely. River, who wears a space suit, carries a diary that looks like the TARDIS. It is filled with her adventures. She is a professor of archaeology. The Doctor learns that he will trust her in the future when she whispers his real name into his ear. The adventure in the Library is River's last real-life meeting with the Doctor in her chronology. It is their first meeting in his. In the second of the two episodes she dies to save the people who were trapped in the Library's database, before the Doctor could do the same. The Doctor is then able to upload her consciousness into a computer. This allows her to live on in a virtual world created by the Library computer. He does this by using a sonic screwdriver that she was given by himself in his future (her past). 