Spring, 1986. Marty McFly, depressed because life without Doc Brown is just plain boring, receives an alarming letter from Clara in 1893: Doc has disappeared in the time stream and Marty is the only one who can find him! Collects issues #6–11.
Back to the Future, Volume 2: Continuum Conundrum
ISBN: 1631407279
ISBN 13: 9781631407277
Authors: Bob Gale, John Barber, Marcelo Ferreira, Athila Fabbio, Toni Doya, José Luis Río, Diego Rodríguez, Esther Sanz, Shawn Lee