Silence in the Library (1) - S4-E8
Question: Is it possible that the 'Silence' part in the title is hinting that River is part of 'the silence'?
Chosen answer: No.
The Sontaran Stratagem (1) - S4-E4
Question: Why did the Sontarans specifically choose to invade Earth? Why not one of the other billions of planets in the universe?
Chosen answer: They wanted a good mix of pollutants to turn the planet into a giant cloning facility. Something humanity was well on its way to doing for them.
Question: Towards the end of the episode "Journey's End", Davros calls The Doctor "the Destroyer of Worlds". Isn't this just a little bit ironic considering Davros and the Daleks were about to wipe out the universe using a reality bomb?
Chosen answer: It's a psychological tactic. The Doctor thinks of himself as a good person, but he's had to do horrible things during the Time War and on other occasions. Davros is playing on his guilt.
Question: Why aren't the effects of Post-Runaway Bride historical episodes like "The Shakespeare Code", "Daleks in Manhatten" and "The Fires of Pompeii" shown?
Answer: They only have 45 minutes in any given episode, so they chose to limit the storyline to those events that the Doctor was directly involved in in the present day. We see that many of the events still unfold as before, just with less pleasant consequences - the Sontarans are still defeated, albeit at the cost of the Torchwood team, the hospital where Martha worked is still returned to Earth, but after everybody dies this time, after Sarah Jane Smith intervenes. Events shown in the historical episodes were presumably also resolved in some less effective manner, but well enough not to affect the present-day timeline to any great degree.
Question: Exactly what part did The Doctor play in the great fire of Rome?
Chosen answer: He burned Nero's original plans for his New Rome, inspiring Nero to burn down Rome to rebuild.
Question: How did they all manage to get into the Tardis just before the base exploded? It was still teleporting in when there were only 5 seconds left. There's no way they could've got inside and took off again in that short amount of time.
Answer: Yes, it looks like they were still staring at the TARDIS in the last few seconds! Once they were inside they would be safe even if it hadn't taken off. Only answers I can think of are the TARDIS extending its force field to protect the crew (which has been done a few times), or it was just edited for dramatic effect.
Chosen answer: No, no information is avalible for the identity of the entity.
Repo_Man