▁in ▁an ▁attempt ▁to ▁make ▁up ▁for ▁his ▁role ▁in ▁the ▁D ale k ▁attack . ▁ ▁In ▁an ▁out - of - sequence ▁encounter ▁with ▁the ▁Fif th ▁Doctor , ▁during ▁the ▁events ▁of ▁the ▁audio ▁drama ▁The ▁Secret ▁History , ▁the ▁Mon k , ▁dist ra ug ht ▁over ▁the ▁death ▁of ▁T ams in ▁D rew , ▁hij acks ▁the ▁Doctor ' s ▁tim eline ▁in ▁an ▁attempt ▁to ▁prevent ▁her ▁death ▁from ▁coming ▁to ▁pass . ▁Using ▁a ▁time - sens itive ▁called ▁Soph ia , ▁the ▁Mon k ▁attempts ▁to ▁dis rupt ▁the ▁Doctor ' s ▁tim eline ▁by ▁causing ▁the ▁Se vent h ▁and ▁Six th ▁Do ctors ▁to ▁switch ▁places ▁with ▁the ▁Third ▁and ▁Second ▁Do ctors ▁respectively ▁during ▁particular ▁advent ures , ▁hoping ▁that ▁the ▁new ▁Do ctors ▁will ▁make ▁mistakes ▁and ▁dis rupt ▁history , ▁but ▁his ▁plan ▁only ▁succeed s ▁when ▁he ▁switch es ▁the ▁Fif th ▁Doctor ▁with ▁the ▁First , ▁forcing ▁the ▁Fif th ▁to ▁let ▁history ▁be ▁changed ▁by ▁es cal ating ▁an ▁out break ▁of ▁disease ▁to ▁the ▁point ▁where ▁the ▁Fif th ▁must ▁allow ▁an ▁advanced ▁al ien ▁race ▁to ▁take ▁action ▁where ▁the ▁First ▁was ▁able ▁to ▁accept ▁the ▁historical ▁consequences ▁of ▁a ▁smaller ▁out break . ▁However , ▁Soph ia ' s ▁ab ilities ▁to ▁see ▁the ▁future ▁prompt ▁her ▁to ▁restore ▁the ▁Fif th ▁Doctor ▁as ▁she ▁sees ▁that ▁the ▁Mon k ' s ▁actions ▁are ▁making ▁history ▁worse ▁in ▁the ▁absence ▁of ▁the ▁Doctor