I remember at the time there was talk of it being the first in a new trilogy. In a way it sort of was, but I haven't dared go near Diary and Survival, I haven't heard many good things about those.
RIP Landau, a guy whose face never changed that much and whose career managed to span completely different eras in film and tv. It's a shame he didn't get any Christopher Lee-style late period blockbuster roles so he could have hits like seven decades apart. Cruise should've put him in one of the Mission Impossibles at the very least.