Nichols returns to 'Jeopardy!' tonight

Answer: This Darmouth professor will appear on Jeopardy tonight for the sixth time. Question: Who is Government Professor Tom Nichols? Nichols accumulated $45,690 during a four-day winning streak on "Jeopardy!" last February but was invited back because the game show inadvertantly penalized him for a correct response he had given during his fifth appearance. If victorious tonight, Nichols, who lost that fifth game by $110, will advance to the Tournament of Champions. Jeopardy airs twice tonight at 7 p.m.