Within hours of arriving back on Earth, one of the Doctor's friends is caught in a deadly explosion, while another appears on television confessing to the murder of twelve people. The TARDIS is stolen by forces intent on learning its secrets. When the Doctor tries to investigate, his efforts are hampered by crippling chest pains. The Doctor must choose between saving his friends or saving Earth in the past, present and future. But the closer he gets to the truth, the worse his condition becomes...
Fitz and Anji.
Dee is very likely an alternate Ace. She makes bombs, is described similarly (page 160) and "D" is probably short for "Dorothy".
The Pentarch is very likely an alternate Brigadier. He carries a swagger stick, has a moustache and comes from the military.
Pg 4 In front of The Assembley Rooms, Edinburgh, April 17 2003 (alternate Earth).
Pg 276 The bottom of the Thames, England 1732.
The Adventuress of Henrietta Street,
The Turing Test.
Pg 1 Reference to Dave.
Pg 4 "First meeting him in 2001, the ice cold of Siberia" Escape Velocity, Time Zero.
Pg 5 "Just a flutter of the hearts, I expect. These things take time to settle in." Camera Obscura.
Pg 10 "Mitch had been positively gleeful when he told Anji about the posh corner office he would be occupying at his new company" Mitch's move to Edinburgh was mentioned in Time Zero (page 68)
Pg 126 "Was this a side-effect of his body adjusting to having two hearts again?" Camera Obscura.
Pg 155 "'You were friends?' 'More than friends.'" Thus confirming the Doctor's sexual relationship with Alan Turing in The Turing Test.
Pg 181 "At some point I suffered a terrible trauma." The Ancestor Cell.
Pg 189 "He had seen so much in his travels with the Doctor. Places where it seemed every death had a meaning" Vanishing Point.
"He had watched his own mother die a slow death of the mind." The Taint.
Pgs 208-209 "A heart condition - it almost killed him. But he got better." The Adventuress of Henrietta Street, Camera Obscura.
Pg 212 "Fitz claimed his own memories were a little haphazard" Escape Velocity; this will be resolved in Halflife.
Pg 222 "It wasn't just the TARDIS, I could feel another voice intermingled with it [...] it sounded like a woman." This is Trix, who's inside the TARDIS at the moment.
Pg 224 "When we first met, you said you'd had some sort of accident, a trauma." Escape Velocity/The Ancestor Cell.
"That didn't seem to be your priority on Hope, did it?" Hope.
Pg 245 "England, 1732 Saturday morning was a curious time to die, the drowning man thought to himself." We see Sabbath's initiation into the Service, as mentoned in The Adventuress of Henrietta Street. But see Continuity Cock-Ups.
Pg 258 "You think of yourself as Time's Champion, Doctor." This was a staple of the New Adventures, first mentioned in Love and War.
Pg 264 "'Silence!' the Oracle said. 'Speak nor move no more.'" The Five Doctors.
Pg 267 "The places beyond the Vortex have been invaded." The Slow Empire.
"Now the Vortex is coming apart, fraying at the edges - nobody knows why. Whatever once sustained it has been removed from eternity." The Ancestor Cell.
Pg 273 "The shrapnel from that blast is now flying forwards, backwards and sideways through time" Battlefield.
Pg 274 "Like the Absolutes of the System." History 101.
OLD FRIENDS AND OLD ENEMIES
An alternate Alan Turing (although this version never met the Doctor in The Turing Test).
An alternate Sabbath (who remained with the service and has never left Earth).
The Jonah and some apes also appear.
The Oracle might be a Chronovore.
NEW FRIENDS AND NEW ENEMIES