▁ten ▁years ▁earlier . ▁ ▁Series ▁run ▁down ▁ ▁Cast ▁ ▁O thers ▁ ▁* ▁PC ▁Know les ▁is ▁never ▁given ▁a ▁first ▁name ▁on - screen . ▁ ▁Archive ▁status ▁All ▁bar ▁one ▁episode ▁of ▁Task ▁Force ▁surv ive ▁in ▁the ▁BBC ▁arch ives ▁in ▁their ▁original ▁format ▁( e ither ▁ 2 " ▁Qu ad ▁V T ▁or ▁ 1 6 mm ▁colour ▁film , ▁depending ▁on ▁the ▁episode ). ▁The ▁one ▁exception ▁is ▁ 1 9 7 2 ' s ▁" Wel come ▁to ▁the ▁Club " ▁which ▁only ▁surv ives ▁as ▁a ▁black ▁and ▁white ▁copy ▁of ▁the ▁originally ▁colour ▁episode . ▁This ▁one ▁black ▁and ▁white ▁episode ▁surv ives ▁on ▁ 1 6 mm ▁film . ▁ ▁DVD ▁release ▁Series ▁ 1 ▁received ▁a ▁Region ▁ 2 ▁DVD ▁release ▁from ▁Sim ply ▁Media . ▁ ▁This ▁was ▁released ▁on ▁ 1 8 ▁November ▁ 2 0 1 3 . ▁▁ ▁Sim ply ▁Media ▁will ▁be ▁re le asing ▁Series ▁ 2 ▁on ▁Region ▁ 2 ▁DVD ▁in ▁September ▁ 2 0 1 6 . ▁ ▁Series ▁development ▁Bar low ▁& ▁W att ▁appeared ▁again ▁in ▁a ▁ 6 - part ▁series ▁in ▁ 1 9 7 3 , ▁which ▁saw ▁Bar low ▁& ▁W att ▁re - app ra ising ▁the ▁Jack ▁the ▁Ri pper ▁mur ders . ▁ ▁The ▁pair ▁would ▁state ▁all ▁the ▁known ▁facts ▁and ▁with ▁the ▁aid ▁of ▁spe cially ▁st aged ▁reconst ru ctions , ▁attempt ▁to ▁work ▁out ▁how ▁the ▁cr imes