The Fall: Part 1 (S06E05)

A mummified, sexually conjoined couple fall from a concealed office during the renovation of a city bank. A sixteen-digit figure engraved on the dead woman's necklace matches the same sixteen-digit figure found on a dead corpse dragged out of the river Thames in 1993. The discovery of these two dead bodies awaken a fraudulent scandal buried in the city of London. (iTunes)