▁the ▁stability ▁she ▁needs ▁after ▁time ▁travel . ▁He ▁also ▁described ▁D anny ▁as ▁" lov able ▁and ▁h ugg able ". ▁D anny ' s ▁first ▁appearance ▁a ired ▁on ▁ 3 0 ▁August ▁ 2 0 1 4 ▁in ▁the ▁second ▁episode ▁of ▁the ▁series , ▁" In to ▁the ▁D ale k ". ▁M off at ▁described ▁D anny ▁as ▁a ▁" comp et itor " ▁of ▁the ▁Doctor , ▁saying ▁that ▁he ▁had ▁a ▁better ▁chance ▁of ▁winning ▁Clara ▁than ▁previous ▁companion ▁boy fri ends ▁such ▁as ▁Mic key ▁Smith ▁and ▁R ory ▁Williams , ▁who ▁appeared ▁weak ▁compared ▁to ▁their ▁Do ctors . ▁ ▁The ▁series ▁finale ▁two - part ner ▁" D ark ▁Water " /" De ath ▁in ▁Heaven " ▁saw ▁D anny ' s ▁character ▁killed ▁off , ▁not ▁once , ▁but ▁twice . ▁His ▁past ▁was ▁also ▁expl ored ▁from ▁The ▁N eth ers phere , ▁an ▁artificial ▁after life ▁where ▁D anny ▁was ▁confront ed ▁with ▁a ▁child ▁he ▁killed ▁while ▁serving ▁in ▁the ▁Afghan istan ▁war . ▁As ▁part ▁of ▁the ▁M ist ress ' ▁plans , ▁D anny ▁was ▁re inc arn ated ▁as ▁a ▁Cy ber man ▁along ▁with ▁the ▁other ▁dead ▁on ▁Earth , ▁but ▁saved ▁the ▁day ▁by ▁taking ▁control ▁of ▁the ▁other ▁Cy ber men ▁and ▁leading ▁them ▁into ▁the ▁sky ▁to ▁expl ode ▁and ▁burn ▁away ▁clouds ▁of ▁Cy ber ▁sp ores ▁meant ▁to ▁convert ▁the ▁living ▁as ▁well . ▁M off at ▁was ▁quoted ▁as