Gavrok Gavrok was the leader of the criminal organisation known as the Bannermen . He led them in their quest to exterminate the Chimeron s . Biography . Searching for Delta . The Bannermen attacked the Chimeron home planet , Chumeria , intending to wipe the Chimerons out . However two Chimerons escaped in a Bannerman craft . Gavrok lay in wait for them and shot Chima . Before dying , Chima shot at Gavrok , knocking him from the craft . The other Chimeron , Delta , fled in the craft . Gavrok and the Bannermen followed her to a toll port where they interrogated the tollmaster as to her location . When he proved unable to provide the information , Gavrok killed him . A mercenary informed Gavrok of Delta ' s whereabouts : Shangri - La camp , Earth in 1959 . Gavrok used a high - impulse beam to kill the mercenary so he did not have to pay him . On Earth . However he had killed him too early . Gavrok did not know precisely where Delta was . He ordered a scan for high technology . They found her and landed , taking Jerome Weismuller and Hawk prisoner . Gavrok ordered two Bannermen to guard the prisoners whilst he and the rest moved on to the camp . They arrived in time to destroy the Nostalgia Tours bus . Gavrok confronted Melanie Bush , the only survivor , and asked if Delta was aboard . She lied , saying she was . Moments later Delta passed by on a motorcycle . Gavrok decided to use Mel and the camp leader Burton as bait . The Seventh Doctor approached the Bannermen under a white flag , but Gavrok shot it . The Doctor told Gavrok to let Mel and Burton go ; he was already in enough trouble . Gavrok signalled the Bannermen guarding Weismuller and Hawk to place a tracker on the bike and booby - trapped the Doctor ' s TARDIS with a sonic cone . Gavrok followed the signal to a dead end . One of the guards told him where Delta ' s hideout was . Gavrok walked into a trap . The Bannermen and he were covered in honey and Goronwy ' s bee ' s attacked them . He reorganised and set out for the camp , where the sound of the Chimeron princess was amplified through a stereo , sending Gavrok and the Bannermen into disarray . Gavrok fell within the perimeter of the sonic cone and was atomised . ( TV : " Delta and the Bannermen " ) Personality . Gavrok wanted to wipe out every Chimeron . He waited aboard a Bannerman craft while his men killed the last Chimerons , predicting that someone would board . He killed Chima whilst his back was turned and taunted Delta when he tried to kill her . Gavrok told the tollmaster he was free to go and then killed him when he turned away , showing he had little regard for honesty . He had little respect for convention . He fired at the Doctor whilst he was under the flag of truce . Gavrok was cunning . He booby - trapped the TARDIS in expectation of the Doctor ' s return . He reacted violently to the incompetence of his troops and often berated them . ( TV : " Delta and the Bannermen " ) Behind the scenes . The script for " Delta " originally described him as follows : " An awesome sight with red eyes and a black militaristic uniform . Gavrok has a Zap gun slung across his chest and a sling in one hand from which hang the long black pennants of his empire . In the other hand is a curved ram ' s horn . " ( INFO : " Delta and the Bannermen " )