Second paragraph of the third chapter of the first story:
"If he's so keen to find these fireballs," Mattias grumbled, "Why isn't the Doctor with us?"Four stories from the Eleventh Doctor's climactic centuries of battle against the bad guys on Trenzalore, each bringing back a classic era monster. The first one, where Justin Richards (who is excellent when, as here, he is on form) brings in the Ice Warriors, is the best; Paul Finch does well with a Krynoid too. Less convinced by George Mann's Autons or Mark Morris's Mara.