"D. Gibbons" is a name featured on one of the notes seen on the Mosaic Investigation wall in Mark's flashforward. As one of Mark's few initial solid memories of the flashback, D. Gibbons quickly became a key character for the Mosaic Investigation. When a woman named Didi Gibbons first visited agents Benford and Noh the question arose if she could be the D. Gibbons. However, it was soon revealed that Didi's involvement with the GBO wasn't direct, but rather linked to a man who had been conscious during the blackout, and also had cloned Didi's credit card.