“Demons run when a good man goes to war
Night will fall and drown the sun
When a good man goes to war
Friendship dies and true love lies
Night will fall and the dark will rise
When a good man goes to war
Demons run, but count the cost
The battle’s won, but the child is lost”
Amy has been captured by the “Silence” and their followers, and is giving birth to a baby girl. The Doctor and Rory (once again in his Roman armor) quickly mount a rescue operation, first finding the location by threatening a Cybermen fleet. Turns out she’s being held at an asteroid base, “Demons Run”.
The Doctor and Rory then quickly assemble an army of allies-Silurian Madame Vastra and Jenny, 19th century detectives who are also skilled fighters. The Sontaran nurse Strax, and black market dealer Dorium. They also have help within the base, a woman named Lorna Bucket.
Along with an army of Silurians and Judoon, as well as the souped-up fighters from World War III they then storm the base and rescue Amy and the infant, now named Melody Pond. The Doctor also sneaks in, disguising himself briefly as a ‘headless’ monk.
After this, scans of melody reveal that she in fact, has an unusual physiology, due to being conceived in the TARDIS-hence she can regenerate, like the Doctor, and also possesses other, unknown abilities.
However, a trap is then sprung, with the TARDIS sealed by forcefield, and a battle ensues with the headless monks in which Bucket and Dorian are killed, and Strax badly wounded. Also, the real Melody has been switched with a flesh duplicate, and then is taken by the Silence leader Madame Kovarian to parts unknown, where she will later grow into the girl seen at the beginning of the season…but there’s more revelations soon to come.
River then appears-not being able to interfere in the battle. She tells the Doctor, Amy and Rory why-SHE is the adult Melody (The name “River Song” being another version of her name). The Doctor meanwhile goes to search for her younger self….
The search doesn’t take too long.
Back in their hometown of Leadworth, the Doctor stops by to talk to Amy and Rory about his search-which so far has been fruitless. However, soon they are approached by Amy and Rory’s friend Mels, who takes over the TARDIS and gets it sent to 1938 Berlin, Germany.
Also there is the Tesselecta, an alien spaceship with miniaturized people disguised as a regular sized man, who are there for other reasons. During a shoot out, Mels is fatally wounded, causing her unexpectedly to regenerate!
Turns out, Melody has been trained since birth by the silence to kill the Doctor, to prevent some future cataclysmic event (the details of which will not be fully revealed until the end of Matt Smith’s run) from happening. After the Nixon/Astronaut adventure in which she briefly escaped the silence, she regenerated from her regular form into the form of Mels, and became a friend of her parents, even serving as a form of matchmaker for them. Now here is where she first becomes “River”, although her past adventures with the Doctor are all set in her future from her POV. Confused yet?
Still going by the name Melody, River-poisoning the Doctor with lipstick-then attempts to escape Berlin, with the Tesellecta after her. Eventually able to catch up with her, the Doctor soon lays dying from, but Amy and Rory-with a little help from the Tesellecta-manage to persuade River that deep down, she’s a good woman-River Song, and has a future with the Doctor, so she gives up her remaining regeneration energy to heal him. She officially changes her name to River Song, and starts her career as an Archaeologist. But her story is far from over….