Neither Ken Clark nor Irina Demick is great , but as they are not asked too much,they do nicely in their parts of a journalist (?) and a secretary (?)."Tiffany Memorandum" is certainly the best of all Ken Clark's spy thrillers ;not that the screenplay is particularly original.It must be the direction.The obscure director (at least to my knowledge) shows sometimes something of Mario Bava's talent .Some scenes are remarkable ,with an unusually inventive sense of space :the clockmaker's workshop with its insistent ticking,the ending in the radio studio with the killer in the place and on the screen (the trick which would be also used in "targets" feat Boris Karloff (Bogdanovitch ,1968)).If you should see one of Dick's adventures,this is definitely the one to choose.You can do without the other sub-James Bond flicks.