SensingdangersurroundinghersisterCarrie-Louise(PenelopeWilton-CalendarGirls,DoctorWho),RuthVanRydock(JoanCollins)enliststhehelpofoldfriendMissMarple.However,afterCarrie-Louise’sbelovedstep-brotherismurderedduringadressrehearsalofanamateurstageshow,MissMarplehastodrawfromherdeepunderstandingofhumancharacterinordertounpicktheconjuringtrickplayedoutbythemurderer,andrevealtheiridentitybbb　　TheyDoItWithMirrorsstarsJuliaMcKenzieasMissMarpleandfeaturesarichensemblecast,includingJoanCollins,BrianCox(TheBourneSupremacy,Zodiac),ElliotCowan(LostinAusten,Happy-Go-Lucky)andAlexeiSayle(TheYoungOnes).