The title is a giveaway - an arc is a curved line. An infinite arc must logically join eventually to make a circle. A circle is another way of writing nought, none or zero and that is how many genuine Peter Davison's there are in this story.
 

Tegan's rather fragile top keeps threatening to let the truth out but, if anything did happen, it was covered up by the production team. Like Peter Davison's death. 
 

The story is written by Johnny Byrne which could well be a deliberate reference to melted or scorched prophylactics present at the scene of Davison's demise.
 

The story is set in Amsterdam, the sexual capital of Europe. Well, it is now Peter Davison's bedroom is no more.
 

Omega traps the Doctor in the Matrix and he is seen to be lying on his back, undulating rhythmically and occasionally moaning.
 

Hedin is nothing if not a suggestive name.
 

The idea of Omega turning into a clone of Peter Davison only to fall apart showed that JNT felt he'd been lucky to get away with it for one year and that the deception wouldn't last much longer
 

Casting an actor called Cumming was hardly the most subtle clue JNT ever committed. Having him spend most of the story in a crypt was the icing on the hint pie.
 

They use the tune "Tulips from Amsterdam" - tulips are placed underground and emerge later. Half of this happened to Peter Davison.
 

The Doctor's face is partially obscured on the video cover to prevent anyone looking too closely at the fraud being perpetrated before their unsuspecting eyes.
 

The cover of the second edition of the novel shows Davison clearly about to ejaculate.
 

Chancellor Thalia is an anagram of "Horn ace lilac halt" which clearly refers to Peter Davison's prowess in life and colour in death.
 

The removal of the main space-time element from the Tardis is an obvious reminder that the main space-time element from Doctor Who - Peter Davison - had been removed.