Kalendorf Kalendorf was a Knight of Velyshaa who played a key role in the formation of the Dalek Empire and the subsequent of the 42nd century . Biography . Kalendorf and the " Angel of Mercy " . Kalendorf was sent to the planet Vega VI , to meet with Earth Security Operative Alby Brook concerning Velyshaan involvement against an impending Dalek invasion . However , the Daleks attacked Vega VI before the meeting could take place . Vega City was laid waste , and Kalendorf barely avoided being killed . Losing hope , Kalendorf was injured , and would have been exterminated by the Daleks if not for the intervention of Susan Mendes . ( PROSE : " Kalendorf " , AUDIO : " Invasion of the Daleks " ) Circumstances forced Susan ( known to Kalendorf as " Suz " ) to become a public speaker for the Daleks called " the Angel of Mercy " , openly promoting the feeling of hope to the subjugated human populations in the Dalek Empire . While this made humans more efficient for the Daleks , it also kept alive the possibility of eventual overthrow of the Daleks . Kalendorf assisted in this by working as Suz ' s assistant . On the surface , Kalendorf provided the moral support that Suz needed to maintain her work as the Angel of Mercy . Underneath that , Kalendorf used Suz ' s activities to build a covert network for rebellion against the Daleks . ( AUDIO : " The Human Factor " ) After many years of war with the Earth Alliance , the Daleks finally cornered and defeated them around Earth ' s solar system . In a galaxy - wide broadcast to announce the victory , Suz triggered the rebellion and was ( apparently ) killed for it . Kalendorf subsequently took command of the rebellion and the re - organisation of the remaining Earth Alliance fleets . ( AUDIO : " " Death to the Daleks ! " " ) Kalendorf as commander . In the following year , Kalendorf and the Earth Alliance liberated most of the galaxy as the Daleks retreated to Lopra Minor , where they activated Project Infinity . However , instead of offering the Daleks contact with an alternate dimension that held the ultimate Dalek race , they connected to a dimension of Daleks ruled by the Mentor , who immediately declared war on this dimension ' s Daleks . The Earth Alliance allied with the Mentor ' s Daleks , and Kalendorf took the role of Supreme Commander . ( AUDIO : " Project Infinity " , AUDIO : " " ) Just before the Great Rebellion , the Dalek Emperor had stored his consciousness inside Suz ' s mind as a safeguard . Once Kalendorf found evidence that Susan Mendes was still alive he rescued her with the help of Alby Brook . The Alliance Daleks wanted her destroyed while the Enemy Daleks wanted her saved , to get their Emperor back . ( AUDIO : " ) " Kalendorf concluded that the Mentor ' s Daleks were just as bad as the Enemy Daleks , and defected to the Dalek Supreme ' s side in the war , along with Suz . ( AUDIO : " " ) After many more years , it was obvious the war would continue until the galaxy was devoid of life . The Mentor abducted Kalendorf , but he remained adamant that our galaxy should be free of all Daleks . In response , the Mentor gave up and returned the Alliance Dalek force to their own dimension . Left with our own ( enemy ) Daleks , Kalendorf then triggered a psychic impulse in Susan Mendes ' mind . Flowing through the Dalek Emperor , it sent an unstoppable signal for all Daleks and Dalek installations to self - destruct . The wave of destruction annihilated almost all Dalek technology in two galaxies . The subsequent collapse of galactic civilisation became known as the Great Catastrophe and Kalendorf was only remembered as " the Dark One " or " the Bringer of Death " . ( AUDIO : " " ) Retirement . Kalendorf made his way home to Velyshaa , where he spent the remainder of his life . Velyshaa constructed a museum dedicated to the Dalek War , and Kalendorf saved a number of " psychic recordings " , both for his own use and as part of the museum ' s archives . Kalendorf was often found in the museum reminiscing about the old days . While there , he was met again by the Eighth Doctor . The Doctor was contemplating a way to permanently destroy the Daleks , but one which had tremendous cost . Asked if there was a better solution , Kalendorf was not able to give the Doctor a satisfactory answer . ( PROSE : " Museum Peace " ) Kalendorf ' s psychic recordings were found 2500 years later by Saloran Haredew . She handed them off to Special Envoy Siy Tarkov , who used them to alert the Galactic Union of the next major invasion by the Daleks in the 67th century . ( AUDIO : " " , AUDIO : " The Exterminators " ) The original recordings — and Saloran Haredew — were destroyed by the Daleks some 24 years later . ( AUDIO : " The Future " )