Benny and Jason discover married life isn't as solid as they'd hoped. Trying to prevent a terrible catastrophe, they contact the Doctor and Chris, but discover the hard way that the road to hell is paved with good intentions...
Benny, Jason, Chris Cwej and Liz Shaw (who dies here).
Pg 110 We don't see it, but the TARDIS landed at Dogubayizit, Turkey, 2003.
Pg 171 On top of the Oktemberyan hill, Turkey.
Pg 174 A spherical chamber inside the moon.
A working knowledge of Blood Heat and So Vile a Sin would be helpful.
Pg 3 "The Venus where they used to remember things by eating each other's brains." Venusian Lullaby.
Pg 26 "It's not my fault Dad did... things to me" As detailed in Death and Diplomacy.
"The Doctor told me it would help to tell everything. You know, write it all down in a book. [...] He said it always worked for him." We saw the Doctor's diaries in The Power of the Daleks and The Telemovie.
Pg 49 "I once saw a boat carrying seventeen tons of trade goods come broadside on to the current while navigating a bend and capsize." and page 52 "I've seen Egyptians use -" It's uncertain what adventure this is referring to. It's not Set Piece.
Pg 51 "Despite this I was finding the old joy of being somewhere I didn't know awakening in me for the first time in ages. For the first time since the wedding in fact." Happy Endings.
Pg 85 "The rings the Doctor had given us clinked together." The Doctor gave them these as a wedding present in Happy Endings.
Pg 115 "I thought about my experiences on Deneb" Deneb is referenced in The Ultimate Adventure.
Pg 118 "She was dead before I knew she was in danger. You know she was, you came to the funeral." So Vile A Sin, but see Continuity Cock-Ups
Pgs 134-135 "I remembered a dying world overrun by dinosaurs, humanity all but extinct." Blood Heat.
Pg 135 Reference to the Brigadier.
Pg 141 "Tell Imorkal I love him." This ties in to Liz's fate at the end of The Scales of Injustice, where she was devoting her life to working with the emergent Silurians.
Pg 153 Reference to Roz.
Pg 165 Reference to Roz.
Pg 167 Reference to Roz.
Pg 171 "Daddy no please not again no" Death and Diplomacy.
"I fell away with a scream. The race fear." The race fear of Silurians was seen in Doctor Who and the Silurians and Blood Heat.
"I screamed. The Earth screamed. The Stranger locked into orbit. They slept and we awoke. Beneath a shining moon, we awoke." Doctor Who and the Silurians.
Pg 172 "A thunderclap of air lifted the chopper and threw us into the air, just enough to clear the control console as we hurtled through the rugby-goalpost-sized doors into the Ship, burst through the even larger door in the inner wall at a height of thirty feet and crashed sideways into a swimming pool the size of a lake filled with crash foam." The widening of the doors was seen in Venusian Lullaby (and by implication in Season 7) and the swimming pool was seen in The Invasion of Time and a number of NAs (it's once again deleted on page 173).
Pg 173 "I pulled Chris past a couple of palm trees into a vestibule." The poolside palm trees from The Invasion of Time have presumably been restored along with the pool itself.
Pg 174 "We found out only moments later as the cloister bell began to ring." Logopolis, Castrovalva, Enlightenment and any number of NAs (including Timewyrm: Genesys).
Pg 185 Reference to UNIT.
Pg 186 References to the Brigadier and UNIT.
Pg 188 Reference to Roz.
Pg 215 Reference to Roz.
Pg 227 Reference to Roz.
Pg 231 Reference to Roz.
Pg 232 "I saw a boy run from his own family" Death and Diplomacy.
OLD FRIENDS AND OLD ENEMIES
Imorkal is presumably intended to be this universe's version of the Imorkal seen in Blood Heat.
NEW FRIENDS AND NEW ENEMIES
Pg 196 The Wood Between the Worlds (which is a metaphor, but is the nearest description we get), timeframe uncertain.