Radiological Dispersal Device crack is the crack/off-width right of Thief in Time. It's better than it might appear. Some stemming down low with a fun, airy step out right to the face up high.
Location
The crack line right of the face route "Thief in Time". If memory serves there's some spray-painted graffiti near the start? Shown as route number 18 on the Overlook route topo photo.
Protection
Medium to large gear to shared anchors with Face Off.