It's a night for "X-Files" addicts and daytime devotees: A two-hour block on Fox includes the season finale of the popular mystery show; also, the annual Daytime Emmys air live from New York.
* "Orioles Baseball" (7:30 p.m.-10:30 p.m., WJZ, Channel 13) -- The Birds are scheduled to take on the Yankees in New York. Note: The game locally pre-empts two CBS nostalgia specials, "TV's All-Time Favorites" (8 p.m.-9 p.m.) and "Ed Sullivan's All-Star Comedy Special" (9 p.m.-11 p.m.). Those shows will air on Washington's WUSA, Channel 9.
* "Family Matters" (8 p.m.-8:30 p.m., WMAR, Channel 2) -- In this series' season ender, Urkel (Jaleel White) and his buddies become roommates. But Urkel's collection of genetically engineered termites jeopardizes the happy household. ABC.
* "The Secrets of The X-Files" (8 p.m.-9 p.m., WBFF, Channel 45) -- Setting us up for the season finale that follows, the network serves up a primer on the surprise hit that has gained a cult following reminiscent of "Star Trek," complete with a book and comic book series. The show includes clips of dramatic moments from past shows. Fox.
* "The X-Files" (9 p.m.-10 p.m., WBFF, Channel 45) -- Last season, Mulder and Scully (David Duchovny and Gillian Anderson) went away for the summer separated from each other and with Mulder apparently brain-washed. This year, their lives and their sanity are in danger after a computer hacker obtains some secret government files. Fox.
* "22nd Annual Daytime Emmy Awards" (9 p.m.-11 p.m., WBAL, Channel 11) -- Early talk show host Merv Griffin is scheduled for a tribute in the annual bestowal of honors, live from New York City. Some of the categories have made for some odd-couple competitions: "American Gladiators" and "Jeopardy!" in outstanding game/audience participation, for example. Can Alex Trebek climb a rope? NBC.
* "Step By Step" (9 p.m.-9:30 p.m., WMAR, Channel 2) -- Lots of shows are ending the season with marriages, but this series does it with the result of a marriage: a baby. Blended-family spouses Carol and Frank (Suzanne Somers and Patrick Duffy) go to the hospital for the birth of their first child. ABC.
* "National Velvet" (11 p.m.-1 a.m., MPT, Channels 22, 67) -- What could be a more appropriate preparation for tomorrow's Preakness Stakes? Elizabeth Taylor and Mickey Rooney star in the quintessential horse race movie, from 1945. MPT.