| Introduction to an old name, sometimes | 38 |
| Introduction to culture, on the farm? | 37 |
| Introduction to the Constitution | 32 |
| Introduction to the Man in Black? | 33 |
| Introductory assortment of wreckage? | 36 |
| Introductory chat room query initials | 37 |
| Introductory course for painters | 32 |
| Introductory painting class, perhaps | 36 |
| Introductory words from an emcee? | 33 |
| Intrude upon, as one's space | 32 |
| Intrude, with ''in'' | 36 |
| Intruder in Mr. McGregor's garden | 37 |
| Intuition of some "Star Wars" villains? | 49 |
| Inuit for "women's boat" | 38 |
| Inuit knife or director Grosbard | 32 |
| Inuit word for "house" | 32 |
| Invaders in "The Martian Chronicles" | 46 |
| Invaders in an H. G. Wells story | 32 |
| Invading Turks in the Middle Ages | 33 |
| Invariable reply to the Little Red Hen | 38 |
| Invasion leaders of the '60s | 32 |
| Invasive plant with yellow flowers | 34 |
| Inventer of spouge music (stage name) | 37 |
| Invention of Morton, Krum et al. | 32 |
| Invention patented on March 14, 1794 | 36 |
| Invention that's not thought highly of | 42 |
| Inventive Vermont blacksmith of the 19th century | 48 |
| Inventor depicted in "The Prestige" | 45 |
| Inventor Edwin's cloak (or painting) | 40 |
| Inventor Elisha and patriot James | 33 |
| Inventor for whom a N.J. township is named | 42 |
| Inventor given a gold medal by Titanic survivors | 48 |
| Inventor of a '60s synthesizer | 34 |
| Inventor of a "Vegetable Compound" | 44 |
| Inventor of a braking system for cars | 37 |
| Inventor of a coil that bears his name | 38 |
| Inventor of a high-rise braking system | 38 |
| Inventor of a mineral hardness scale | 36 |
| Inventor of a practical gyroscope | 33 |
| Inventor of a steel-making process | 34 |
| Inventor of a Turkish confection? | 33 |
| Inventor of an alcohol thermometer | 34 |
| Inventor of first digital calculator | 36 |
| Inventor of the alcohol thermometer | 35 |
| Inventor of the centigrade thermometer | 38 |
| Inventor of the compression-ignition engine | 43 |
| Inventor of the electric battery | 32 |
| Inventor of the electric car battery | 36 |
| Inventor of the first digital calculator | 40 |
| Inventor of the first electric battery | 38 |
| Inventor of the Marching Bands puzzle | 37 |
| Inventor of the Mothers of Invention | 36 |
| Inventor of wine, according to the Bible | 40 |
| Inventor who gave skyscrapers a boost | 37 |
| Inventor who had his ups and downs | 34 |
| Inventor who had his ups and downs? | 35 |
| Inventor who inspired this puzzle | 33 |
| Inventor who laid it on the line | 32 |
| Inventor whose last name is a code | 34 |
| Inventor with an up-and-down career? | 36 |
| Inventor's "impossible dream" | 43 |
| Inventor's "light bulb" | 37 |
| Inventor's "lightbulb" | 36 |
| Inventor's "step one" | 35 |
| Inventor's or author's quest | 36 |
| Inventor/electrical engineer Nikola | 35 |
| Inventor–clock-maker Terry | 33 |
| Inventors : patents :: authors : -- | 35 |
| Inventors may try to build a better one | 39 |
| Inventory in an oenophile's cellar | 38 |
| Inventory stock, in adventure games | 35 |
| Inventory ___ (euphemism for shoplifting) | 41 |
| Inverse function in trigonometry | 32 |
| Inversion, such as "Came the dawn" | 44 |
| Invest emotion in, to a psychoanalyst | 37 |
| Invest with sacerdotal responsibilities | 39 |
| Investigate (with ''into'') | 43 |
| Investigate (with "into") | 35 |
| Investigate, with "into" | 34 |
| Investigated with "about" | 35 |
| Investigated, with ''into'' | 43 |
| Investigated, with "into" | 35 |
| Investigates, with "into" | 35 |
| Investigation into a social networking site? | 44 |
| Investigation into the death of a famous writer? | 48 |
| Investigation of one person after another? | 42 |
| Investigative division (and puzzle theme hint) | 46 |
| Investigative journalism piece, perhaps | 39 |
| Investigative journalist's piece | 36 |
| Investigative journalist's report | 37 |
| Investigative reporter's asset | 34 |
| Investigative reporter's specialty | 38 |
| Investigator in the USS Cole attack | 35 |
| Investigator of family problems, say | 36 |
| Investigator of many accidents, for short | 41 |
| Investigator of unnatural deaths | 32 |
| Investigator's employer: Abbr. | 34 |
| Investigators sometimes follow them | 35 |
| Investing formula used by a portfolio manager | 45 |
| Investing largely in money markets, say | 39 |