: Director McG noted the film's core theme is "where you draw the line between machines and humans," explored through Marcus's internal struggle and his redemption. Extended Media and Novelizations
Terminator Salvation (2009) is the fourth installment in the Terminator franchise, pivoting from the contemporary "chase" formula of its predecessors to a post-apocalyptic war setting in the year 2018. terminator-salvation
The film's universe was expanded through several literary works that provide deeper "detailed text" for fans: 'Terminator: Salvation' brings God-talk into open spaces : Director McG noted the film's core theme