Enemy of the Bane ( TV story ) Enemy of the Bane was the sixth and final serial in series two of " The Sarah Jane Adventures " . It introduced the Black Archive , a collection of very dangerous alien technology that UNIT guards with maximum secrecy and security . It also included the return of villains Mrs Wormwood and Kaagh . Most notable was the surprising return of another character with a long history in the " Doctor Who " series : the Brigadier . Lethbridge - Stewart had not appeared on television since the " Doctor Who " story " Battlefield " in 1989 . This was the final televised appearance of the Brigadier . Nicholas Courtney died in 2011 . His character was then retire d through his passing away during the events of TV : " The Wedding of River Song " . Synopsis . Gita Chandra is kidnapped by Mrs Wormwood . This turns out to be a snare for Sarah . Mrs Wormwood has joined forces with another of Sarah ' s enemies , Kaagh . As they prepare to settle old scores , Sarah turns to an old friend . Plot . Part 1 . Gita Chandra is working late on a special floral commission . The client turns out to be Mrs Wormwood . She paralyses Gita , certain the disappearance of Rani ' s mum will lure Sarah Jane Smith to the case . At the same time , Luke has been having nightmares about Mrs Wormwood . Rani realises her mum has vanished . Sarah and Luke go to the Chandras ' house and talk to her and Haresh about what happened . Rani suspects it could be aliens at work , but Sarah says that it is not always aliens . People go missing all the time and come home safe . Sarah , Luke and Clyde head to Gita ' s shop , Bloomin ' Lovely , to investigate while Sarah uses her scanner watch to search for alien traces . Luke and Clyde find a cheque signed by Mrs Wormwood . When Mr Smith scans it , there is a hidden code which offers clues to Mrs Wormwood ' s location . Sarah and Rani go to rescue Gita , discussing the Bane and Bubble Shock on the way . They find Gita in a trance , unresponsive , and meet up with Mrs Wormwood . The former Bane operative explains she took the blame for her species ' failed attempt at invading the Earth and has been exiled from her people and world . The Bane will eat her alive if they catch her . When the Bane attack , Mrs Wormwood uses her phonic disruptor on them . It emits sound which penetrates their ears and stops them in their tracks . The Bane grab Sarah by the leg , but Mrs Wormwood saves her , attacking the Bane with a metal pole . The three head back to Bannerman Road , shocking Luke when he opens the door . In the attic , Mr Smith does a bio - analysis on Mrs Wormwood , confirming she is Bane . Mr Smith asks if having her in the attic is a good idea . Sarah asks Mr Smith to put a containment field around her if she causes trouble . Mrs Wormwood says that an ancient immortal , Horath , tried to take over the galaxy , but was defeated three thousand years ago . Unable to destroy him , Horath ' s captors separated his body and consciousness and placed them at opposite ends of the galaxy . Mrs Wormwood says the Bane have found Horath ' s consciousness , and are trying to find his body , which is , like so many other things of galactic importance , on Earth . Once united , the Bane will be able to conquer the galaxy . The only clue to the body ' s location is in the Tunguska Scroll , kept in UNIT ' s Black Archive , a secure storehouse of alien artefacts . Sarah visits her old friend , retire d Brigadier Sir Alistair Gordon Lethbridge - Stewart , to get his help to enter the Archive . Sarah and Rani obtain the Tunguska Scroll . UNIT personnel stop Sarah , but she uses her sonic lipstick and escapes with Rani and the Brigadier . Meanwhile Luke talks to Mrs Wormwood . When the Bane attack the house , he releases her from the force field . She is about to escape when a Bane tries to eat her . Sontaran Commander Kaagh shoots it and reveals himself as her agent . Part 2 . Luke and Clyde are surrounded by Bane . Clyde picks up a hose and soaks the Bane , trying to force them back . Mrs Wormwood arrives and uses her phonic disruptor to blow up the Bane , leaving goo on Luke and Clyde . Sarah arrives with Rani and the Brigadier . To prevent UNIT finding them , Sarah , Luke , Clyde , Rani , the Brigadier and Mrs Wormwood all hide in Gita ' s flower shop . Mrs Wormwood asks Sarah for the scroll but she refuses . Commander Kaagh arrives and grabs Sarah ' s sonic lipstick , destroying it . He demands the scroll and threatens the youngsters . Sarah gives the scroll to Mrs Wormwood . Mrs Wormwood forces Luke to go with her and Commander Kaagh . Mrs Wormwood , Kaagh and Luke arrive at a factory where Kaagh has hidden his space pod . He places the Consciousness of Horath in the scroll . Mrs Wormwood says that Luke could be ruler of the galaxy as her son . Luke grabs the scroll and runs . Kaagh chases him . Just as Kaagh is about to shoot Luke , Mrs Wormwood , in her Bane mode , jumps in front of Kaagh and transforms back to human . She uses her phonic disruptor again . Meanwhile the others go to Sarah ' s house to speak to Mr Smith , to try to find the whereabouts of Luke , Mrs Wormwood and Kaagh . Major Kilburne tries to stop them , revealing himself as a Bane agent . The Brigadier uses a hidden gun in his cane to stun the Major . They borrow Gita ' s van and go after their friends . Mrs Wormwood , Luke and Kaagh arrive at a stone circle and find a force field around it . Only humans can enter . Mrs Wormwood forces Luke to insert the scroll . When he does , the stone circle opens . It ' s a portal which leads to Horath . Mrs Wormwood uses her sonic device again and Kaagh drops to the ground . Sarah arrives . Mrs Wormwood tries to convince Luke to go with her , saying she is his mother . Luke says his real mum is Sarah . Clyde , meanwhile , walks over to Kaagh to check if he ' s hurt . Kaagh asks Clyde to help him regain his honour . Mrs Wormwood is upset , but convinces herself that the best way to heal her broken heart is to kill Sarah ' s gang . However , as she prepares to do so , Kaagh shouts , " Sontar - ha ! " and pushes her into the portal . It explodes , trapping them in another dimension , leaving Luke feeling a bit sorry for Mrs Wormwood . Sarah Jane reveals she has another sonic lipstick and destroys the scroll . She then reflects on how amazing the universe can be , as well as her own corner of it , as she bids goodbye to the Brigadier . She asserts that aliens will always visit Earth as it ' s a wonderful place to be . Story notes . Ratings . " to be added " Filming locations . " to be added "