Hydranencephaly (or hydrancephaly) is a type of cephalic disorder. These disorders are congenital conditions that derive from either damage to, or abnormal development of, the fetal nervous system in the earliest stages of development in utero.
Voyage to the Bottom of the Sea Cast. 1  Stars (2) EDIT Richard Basehart. 2  Guest Stars (287) EDIT Patrick Culliton. 3  Cameos (1) EDIT Seymour Cassel. 4  Writers (29) EDIT Harlan Ellison. 5  Directors (21) EDIT Alan Crosland Jr. 6  Crew (5) EDIT Peter Packer.
Trek alumni from TV shows and movies will schmooze with passengers on the Norwegian Pearl cruise, including: -- Jonathan Frakes, who played Commander William T. Riker on the TV's Star Trek: The Next Generation and in motion pictures; -- Marina Sirtis, who played counselor Deanna Troi on Star Trek: The Next Generation; -- singer and actor James Darren (yes, Moondoggie in the 1959 Gidget film) who appeared in Star Trek: Deep Space Nine for a few seasons.