DEAN: So that’s your mom?
LANE: That’s my mom.
DEAN: Has she seen Patton?
Patton is a 1970 biographical film about US General George S. Patton during World War II; it was directed by Franklin J. Schaffner, and starred George C. Scott in the title role. The film shows one of General Patton’s first tasks as head of operations in North Africa was to enforce discipline among the American troops, so Dean is suggesting that Mrs. Kim may have modelled herself on the strict general.
Patton was the #4 film of 1970, and received enthusiastic acclaim from critics; it was also Richard Nixon’s favourite film. The film won seven Academy Awards, including Best Picture and Best Director: George C. Scott won Best Actor, but famously declined the honour, the first person to turn down an Oscar.