When I first saw the lovely independent film Driveways last fall, I didn’t know that I was watching one of Brian Dennehy ‘s final performances. I remember thinking he was wonderful in the movie, which in itself was no surprise. I also remember wishing that this great American actor, so acclaimed for his work on stage and television, had been given more of his due in movies. In Driveways , Dennehy gives the kind of graceful, deeply lived-in performance that reminds you why he was so often taken for granted: When you never hit a false note, you run the risk of making it look easy. Dennehy plays a suburban widower named Del who befriends a woman and her 8-year-old son when they temporarily move into the house next door. Kathy, played by Hong Chau, and her son, Cody, played by Lucas Jaye, have driven some distance so they can clean out the house of Kathy’s late sister, April, and put it on the market. Easier said than done: April was quite the packrat, and the house is a mess, full of