The Doctor finds himself haunted by ghosts at sea. But ghosts can't
exist... can they?
Aboard the Queen Mary, October 1963.
None, although much of this follows up The Deadly Assassin.
Pg 16 "After my recent, and troubled, return to my home." The Deadly
Pg 22 There's a brief mention of Daleks and Cybermen.
Pgs 45-46 "Denying reality was, I reasoned, something that had worked
successfully for me in the past." The Deadly Assassin (but see Continuity Cock-Ups)
Pgs 47-48 "Was this, perhaps, an after-effect of my experiences within
the Matrix on my recent visit to Gallifrey?" The Deadly Assassin.
Pgs 48-49 "I was reminded, briefly, of an incident in a darkened,
shadowy French church in the 14th century." Uncertain reference.
Pg 61 "I hit the Fast Return switch, in irritation, for the first time
in what seemed like a lifetime or three." The Fast Return Switch was seen
in The Edge of Destruction and The Witch Hunters.
"This was different from the manifestations at Auderly House, the pulse
spirits in the Cave of Horrors on Cassuragi III or haunted castles on the
planet of Kambalana." Day of the Daleks, uncertain references.
Pg 88 "As a concept to define whether free will is merely an illusion
after all?" This paraphrases a line from Inferno.
Pg 95 "I was reminded of a deep and lengthy conversation I had once
shared with a Roman centurion, at a settlement near Condercum" This might
have occurred during Byzantium!.
Pg 99 "From the pain and misery and the self-doubt and all those other
things I thought I had left behind on Gallifrey and on Skaro." The Deadly
Assassin, Genesis of the Daleks.
OLD FRIENDS AND OLD ENEMIES
NEW FRIENDS AND NEW ENEMIES
Raymond Bryce and Jarvis are the only survivors, although in this case the
dead may count, which would include Simpkins and Osbourne.