The Little Sisters of Eluria - S1.E1

The tale features Roland of Gilead, whose quest for the Dark Tower is in its infancy; its events precede those of the body of the Dark Tower cycle, but occur after Roland's experiences in Mejis, as chronicled in The Dark Tower IV: Wizard and Glass. At the time of telling he is accompanied by a horse and is already following Walter o'Dim, the Man in Black. He plans to eventually buy another horse, or perhaps a mule, which ties in with the events at the beginning of The Dark Tower: The Gunslinger.