When fourteen-year-old Jo Tiegan is given an antique mirror by a mysterious antique-shop owner in 1995, she finds she can travel through the mirror's surface into her bedroom as it was in 1919. She and the house's previous occupant, Louise Iredale, become firm friends, but find themselves caught up in two interlocking mysteries: the presence of a container of toxic chemicals in Louise's neighbour's well (which seriously injures two of Jo's classmates during an archaeological excavation in 1995) and the entrapment of Nicholas Romanov (the Tsesarevich Alexei Nikolaevich) by Louise's neighbour, who has smuggled him out of Russia in the hopes of selling him to the highest bidder.
Mirror, Mirror was a co-production between Australian-based Millennium Pictures (founded five years earlier by show creator Posie- Graeme-Evans) and New Zealand-based Gibson Group.
The program was successful and highly awarded, and was followed two years later by a loose sequel, which shares nothing with the original series but the basic premise of time travel through a mirror.