 In the first episode of the series, "The Eleventh Hour", Prisoner Zero tells the Doctor, "The universe is cracked. The Pandorica will open. Silence will fall". The Pandorica was also mentioned by River in "Flesh and Stone" as the next time she would meet him, and the Doctor dismissed the Pandorica as a fairy tale. In River's timeline this takes place before "The Time of Angels" / "Flesh and Stone". The painting of the TARDIS explosion passes through several characters from previous episodes: the painting is created by Vincent Van Gogh (Tony Curran) after his meeting with the Doctor ("Vincent and the Doctor"). The painting is found in 1941 by Winston Churchill (Ian McNeice) and Professor Bracewell (Bill Paterson) from "Victory of the Daleks", and River steals the painting from Liz 10 (Sophie Okonedo), who previously appeared in "The Beast Below". The recurring phrase "silence will fall" came to a head in the next series with the introduction of the alien species and organisation of the Silence. The message on Planet One, "ΘΣ Φ ΓΥΔϟ," starts with "Theta Sigma (ΘΣ)," which was The Doctor's "nickname" in his academy days.
