Race to Mars is a two part TV movie about first human mission to Mars in 2030. The movie was made by Discovery Channel Canada in 2007. It is as scientific as it can be and covers almost all possible problems which can occur in such mission (even being too harsh if you ask my opinion). Although it is not officially stated - Race to Mars is heavily based (with modifications of course) on now canceled Constellation mission design of NASA.
Watch the entire movie: