Release Message:  The TARDIS runs right into a time corridor, called Timelash, and the Doctor (Colin Baker) finds a society with advanced technology it shouldn't have along with an unnerving absence of reflective surfaces of any kind.

Description:  A time corridor, called Timelash, has been set up to punish dissidents on the planet Karfel, dumping them alive but permanently into Earth's early history. The TARDIS runs right into it, and the Doctor thereafter finds a society with advanced technology it shouldn't have along with an unnerving absence of reflective surfaces of any kind.