The Return of the King (1980) (TV)

Frodo's magic ring has now become the Ring of Doom - and to restore peace it must be destroyed in the raging fires in which it was made. Chosen for the task, Frodo and faithful servant Samwise face grave perils - the worst of which is the ring's terrible power to possess its wearer. Will Frodo give in to the madness of the ring... or will he fulfill his quest?