Peri and the Piscon Paradox (audio story)

 was the seventh release of the fifth series of the Companion Chronicles produced by Big Finish Productions. It was also the first Companion Chronicles release to feature an actor who played the Doctor, with Colin Baker playing his role of the Sixth Doctor. However, Nicola Bryant provides narration as well as the Fifth Doctor's dialogue.

Publisher's summary
The Doctor and Peri journey to Los Angeles 2009 to do battle with a Piscon. His name is Zarl, and he's a fish of utmost evil.

Zarl is going to steal all the water of Earth and sell it to the highest bidder. Or blow up the San Andreas fault. Or the planet. Or something like that. He's a bit vague on that point.

Fortunately, to stop him there's help from an unexpected source: a future version of Peri. She knows Zarl's dark secret.

But should the future Peri be on Earth at all? Something smells fishy — and it's not just Zarl.

Plot
to be added

Cast

 * Peri Brown - Nicola Bryant
 * The Doctor - Colin Baker

Cultural references from the real world

 * Peri says there was panic about diseases during the 1980s.
 * Peri compares the expression on Carburetor's face to a face on a Picasso painting.

Music

 * Peri wonders if Frankie Goes to Hollywood is still popular in 2009.
 * Peri remembers the Dolly Parton song Islands in the Stream.

Films and TV series

 * Peri mentions the game show Jeopardy!
 * On seeing her older self for the first time, the young Peri wonders if she is an actress who used to play the Fonz's girlfriend in Happy Days.
 * Peri compares the future Peri to Audrey Hepburn in Breakfast at Tiffany's.
 * Peri nicknamed her first boyfriend "Curious George".
 * The younger Peri is totally unaware that The X-Files is a science fiction television series from the 1990s. The Fifth Doctor comments that it was never as good after David Duchovny left.
 * Carburetor says the explosion of the car is like an Industrial Light and Magic special effect. She says it is almost as good as Star Wars.

Literature

 * Peri compares the Fifth Doctor's actions to a character in a P. G. Wodehouse novel.

The Doctor

 * The Doctor wears his Half Moon Spectacles, possibly for the last time.
 * The Doctor is able to defeat Zarl by throwing his cricket ball.
 * Peri compares the Doctor's accent to Prince Charles's.
 * The Peri of 2009 wonders if the Doctor could regenerate into George Clooney, and compares regeneration to the reinvention of Madonna.

Peri

 * Peri's parents, Janine and Paul Brown, were married on 21 November 1962.
 * Peri's aunt Mona dresses in a similar manner to the Sixth Doctor. She collects golliwogs, which she orders from England.
 * Peri has a degree in botany.
 * Peri has previously worked as a Samaritan.
 * Peri eats Doritos.
 * A Time Lord tells the Doctor about the many versions of Peri.

Theories and concepts

 * Both the Fifth and Sixth Doctors mention the Blinovitch Limitation Effect.
 * The Sixth Doctor mentions the web of time.

Continuity

 * The Fifth Doctor compares the Piscons to the Pescatons, however he believes the Pescatons are more violent. He says they both originated from the Piscos star system and that their world was destroyed by an expanding sun. (AUDIO: Doctor Who and the Pescatons)
 * The younger Peri wonders if her mother Janine Foster is still alive in 2009. (AUDIO: The Reaping)
 * The older Peri claims that the disappearance of the crew of the Mary Celeste was caused by Piscons wanting to take over human forms. This was later revealed to be completely made up. In reality, the First Doctor and his companions Ian Chesterton, Barbara Wright and Vicki Pallister were indirectly responsible for their disappearance. (TV: The Chase) The Doctor had discovered his own involvement with the crew's disappearance by the time of his second incarnation. (AUDIO: The Forsaken, The Rosemariners) Earlier in his personal timeline, the Fifth Doctor told Alan Fitzgerald, a student summer intern at the Gogglebox, that he was "sort of" responsible. (AUDIO: The Gathering)
 * Following their encounter with the older Peri, the Fifth Doctor and the younger Peri travel to Androzani Minor in the Sirius star system. (TV: The Caves of Androzani)
 * In an attempt to jog the older Peri's memories, the Sixth Doctor mentions Sil (TV: Vengeance on Varos, AUDIO: Mission to Magnus, TV: Mindwarp), the Tractators (AUDIO: The Hollows of Time), the Ice Warriors (AUDIO: Red Dawn, The Bride of Peladon, Mission to Magnus) and Davros (TV: Revelation of the Daleks).
 * The Sixth Doctor claims that he has been having difficulty with his memory since his most recent regeneration. This could account for the fact that he did not remember meeting Kathy Chambers for the first time in his personal timeline in Brisbane, Australia in September 2006 while in his fifth incarnation (AUDIO: The Gathering) when they met for the second time (from his perspective) in Baltimore, Maryland in September 1984 while in his sixth incarnation (AUDIO: The Reaping).
 * The older Peri remembers her first encounter with the Doctor involving a "robot with an identity crisis", "some religious types", a "" and Turlough. (TV: Planet of Fire) She only remembers their first encounter because of interference from the Time Lords, as happened with Jamie McCrimmon and Zoe Heriot. (TV: The War Games)
 * The Sixth Doctor remembers his previous incarnation and the younger Peri encountering the older version of Peri defeating Zarl in Los Angeles in 2009. This is similar to PROSE: Cold Fusion in which the Seventh Doctor remembers the events of the novel from the perspective of the Fifth Doctor and uses this knowledge against his younger self.
 * Though it is not stated directly, the older Peri was presumably returned to Earth at some point after September 1984. (AUDIO: The Reaping)
 * An unidentified Doctor, likely the seventh, would later visit the version of Peri serving as princess, who would not forgive him for abandoning her. (PROSE: Reunion)
 * The Doctor says that humanity had conquered half the galaxy by 2050. (TV: Kill the Moon, The Waters of Mars)
 * Peri wonders if Earth is being invaded all the time by 2009. (TV: Aliens of London/World War Three, The Stolen Earth/Journey's End et al.)
 * The Doctor offers the older Peri a chance to travel with him in the TARDIS again. He would later give the same offer to the version of Peri on Krontep. (AUDIO: The Widow's Assassin)
 * The Time Lord tells Peri that the Peri living with King Yrcanos has three children, something she wanted but could not have as this version lost the ability to reproduce through abuse from her husband Davey Silverman, and was content that a version of her was able to have it. In another version of events, Peri had been rendered infertile through her exposure to spectrox toxaemia on Androzani Minor. (AUDIO: The Widow's Assassin)