The term 'LINDEN OR HOLBROOK' can be solved by the three-letter word 'HAL'. Hal Linden and Hal Holbrook are both American actors who have had long and successful careers in film, television, and theater. Linden is best known for his role as the title character in the 1970s sitcom Barney Miller, while Holbrook is best known for his one-man show Mark Twain Tonight! and his Academy Award-nominated performance in Into the Wild.