The Acheron Pulse Explained

The Acheron Pulse
Publisher:	Big Finish Productions
Series:	Doctor Who
Number:	166
Featuring:	Sixth Doctor
Director:	Ken Bentley
Executive Producer:	Nicholas Briggs Jason Haigh-Ellery
Production Code:	7CPRE-A/A-3
Date:	October 2012

The Acheron Pulse is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who.

Plot

The Doctor returns to The Drashani Empire, which is now under attack from alien invaders known as The Wrath.

The Doctor – Colin Baker
- - - Tenebris – James Wilby Dukhin – Joseph Kloska Teesha – Jane Slavin Vincol – Chris Porter
Boritz – John Banks
- Athrid – Chook Sibtain Olerik – Carol Noakes
Empress Cheni – Kirsty Besterman

This is the second in a trilogy of stories that began with the Fifth Doctor in The Burning Prince and concludes with the Seventh Doctor in The Shadow Heart.
Three decades have passed since the Doctor's last visit.

In the Whovian timeline, this story takes place between Urgent Calls and The Marian Conspiracy.
Chook Sibtain was in the 2009 Tenth Doctor episode The Waters of Mars, as well as The Sarah Jane Adventures story, Warriors of Kudlak.
Jane Slavin was in the 1993 Third Doctor radio play, The Paradise of Death.