Premise: Randall Flagg . He has a variety of names , usually with the initial letters `` R. F. '' but with occasional exceptions , such as Walter o'Dim ( originally envisioned by King as a separate character ) in The Dark Tower series . The Dark Tower expanded on Flagg 's background and motivation , linking his previous appearances . Aside from King 's novels , Flagg was featured in a television miniseries adaptation of The Stand ( played by Jamey Sheridan ) and the upcoming Dark Tower film adaptation ( played by Matthew McConaughey ) . He has also appeared in Marvel Comics ' adaptations of The Dark Tower and The Stand .
Hypothesis: Randall Flagg has appeared in Dark Tower.
Label: ENTAILMENT