Children of Men (2006)

a.k.a. 

Disabilities:  Alzheimers, wheelchair

Comments:   Interesting and engaging film about a Britain of the future in which no woman has given birth for over twenty years. A young pregnant woman is discovered and channelled through an 'underground railroad' (like black slaves in the U.S.) to a safe haven.
Michael Caine plays a character who helps along the way and his wife is in a wheelchair has dementia/alzheimers.

http://www.imdb.com/title/tt0206634/

Good reviews at http://www.reelviews.net/movies/c/children_men.html
http://www.salon.com/ent/movies/review/2006/12/25/children/index.html?CP=IMD&DN=110