Shockwave ( audio story ) Shockwave was the seventh release of the " Destiny of the Doctor " audio series , produced by Big Finish Productions for AudioGO . Publisher ' s summary . In the far future , the inhabitants of Tarsus Six face a desperate struggle to evacuate their world before their sun , Tarsus Ultra , collapses into a cataclysmic spatial anomaly . When the Doctor navigates the TARDIS to a space station orbiting Tarsus Six , Ace assumes that he intends offer their assistance . But it soon becomes clear that the Doctor has an agenda of his own . With the TARDIS immobilised , Ace realises that their own lives are as much in danger as those of the fleeing inhabitants . The race is on to escape the destruction of Tarsus Six and the devastating shockwave that will follow , reaching out and destroying everything in its wake . Plot . The TARDIS lands on a space station in the 49th century . The station orbits a world called Tarsus Six , part of a system that has been heavily colonised by humanity . It ' s a world in chaos , and for good reason : it only has minutes to live . The planet ' s sun , Tarsus Ultra , is a red giant , but something is wrong : it ' s tearing itself apart , not as a supernova , but in some other , unknown way . Truthfully , the damage is done ; the star has already released a massive shockwave that has destroyed the inner colonies , and is closing in on Tarsus Six . Ace wants to save everyone , but the Doctor sadly tells her they can ' t — it ' s too late . Ships are fleeing the planet , some making it , some not . It ' s the same on the station . The Doctor and Ace meet a ship captain , OhOne , and his first officer , KaySix . Masquerading as authorities from Earth , they get themselves onto the " Obscura " , the last ship leaving the station . They have the TARDIS brought aboard as well . On the way , Ace sees a group of cultists who worship the star and believe the shockwave will cause them to evolve . She makes contact with one girl in the group , NineJay , and at the last minute uses the ship ' s transmat cubicle to bring her aboard and save her life — though it angers some of the passengers , who blame the cultists for the destruction of the star . The ship , with the Doctor ' s help , barely outruns the shockwave just as it destroys the station and Tarsus Six . The Doctor takes Ace to check on the TARDIS , and tells her that they are trapped for now , as the TARDIS can ' t leave due to interference from the shockwave . She asks why they are here ; he tells her they are here to rob a bank vault . Ace is understandably disturbed , but the Doctor promises that they are not actually stealing ; the artefact he wants belongs to him , sort of . It ' s a cube called the Voice of Stone , in the locals ' vernacular . They had to come here , because the Voice ' s location can only be verified here and now . The Doctor says it will speak to him , if he can get to it . They reach the vault , and Ace goes to distract a sound - seeking security drone that has been following them , thus buying them some time . The Doctor has found the vault to be already unlocked — and the Voice has been stolen . Suddenly the alarms go off , and they are arrested by the captain . It is revealed that they are not diplomatic envoys . The Doctor reveals that the Voice is missing , and that they did not steal anything . They are interrupted when the engines suddenly fail . OhOne takes them with him to check the engines , as the door won ' t lock without power ; the Doctor restores the power , but the engines are still dead . The Doctor bargains for their freedom , in exchange for helping with the situation . KaySix discovers that the engines were actively sabotaged ; security reveals that it was the girl , NineJay , whom Ace rescued . Ace goes to find her , and finds her in Ace ' s stateroom . NineJay reveals she was sent to join the ship so she could disable it , thus allowing everyone aboard to die in the shockwave and evolve ; she says she almost missed the ship , and is grateful that Ace helped her . Ace lectures her for taking the choice from everyone aboard , but NineJay is unpersuaded ; and she reveals that she took the Voice of Stone , or rather , " set it free " . And now the shockwave is beginning to arrive ; its outer fringes act as a warning shot against the ship . Time is running out . NineJay gives the Voice to Ace , and reveals that she used the ventilation shafts to sneak around . The cube feels and seems to be alive ; it reminds Ace of the TARDIS , and she thinks it is from Gallifrey . It responds to her , stunning NineJay . KaySix arrives and tries to break into the stateroom ; Ace escapes through the vents , with NineJay following . As they make their way to the engine room , OhOne broadcasts an announcement , indicating that the ship cannot escape the shockwave . However , they have a plan to use the main power unit to create a counterforce that will shield them until the shockwave passes . The ship will then be adrift , but can be recovered later with its passengers . However , someone must stay with the power unit to trigger it , and will die in the process . OhOne volunteers . Ace arrives after the power unit is launched . Ace tells the Doctor her story , and turns over the Voice to him . The wakes up . It releases an image of a strange man , who is revealed to be the Doctor , which speaks to both of them . It can ' t hear them , but it remembers the conversation , and speaks accordingly . He acknowledges that he sent messages to the previous six , and asks the Seventh Doctor for help . The Seventh Doctor and Ace must save OhOne . . . who is on his way to die right now . He also tells the Seventh Doctor to be nicer to Ace . Ace realises that this means the Doctor will survive . . . but what about anyone else ? The shockwave is arriving , just two minutes away . OhOne has activated the counterforce wall , and is still alive . . . but the Doctor insists there is no way to save him now . He must be there to keep it active . Ace suggests that someone could take his place , but the Doctor won ' t let her do it . NineJay volunteers , however ; she had long since chosen to die in the shockwave anyway . The Doctor is distrustful , thinking she will deactivate it and let everyone die ; but she concedes that Ace was right to say that she can ' t take the choice from everyone else . It ' s a conflict of faith for her , not on her own behalf , but on that of everyone else . She transmats herself to the power unit , and transmats OhOne back . With the shockwave passing by , the Doctor and Ace are free to go . Ace can ' t help wondering if there ' s some chance that NineJay was right — could she , somehow , have survived ? They may never know . She cautions OhOne to be grateful — and maybe , he ' ll return the favour for someone in the future . They leave him shocked at the sight of the departing TARDIS .