Him again? Cal's back -- and tonight's game is on WJZ, Channel 13, so all viewers can see him move past Lou Gehrig to capture baseball's record for good attendance. ABC's Sam Donaldson also returns from cancer treatment for a notable interview on "PrimeTime Live."
* "Orioles Baseball" (7:30 p.m.-10:30 p.m., WJZ, Channel 13) -- This is it! And if you have to ask "what?" you must have been living on another planet. Cal Ripken Jr. is expected to set a new consecutive-games-played record of 2,131 tonight at Camden Yards.
* "National Geographic: The New Chimpanzees" (8 p.m.-9 p.m., WBAL, Channel 11) -- Linda Hunt narrates this recounting of recent chimpanzee studies in Africa. The species shares 97 percent of its genetic makeup with humans. NBC.
* "Dateline NBC" (9 p.m.-10 p.m., WBAL, Channel 11) -- Here's an exciting vacation idea: Go diving with a great white shark! Thrill-seekers are doing it off the California coast, but the practice of luring the fearsome swimmers with "chum" -- bait -- has set off protests. NBC.
* "PrimeTime Live" (10 p.m.-11 p.m., WMAR, Channel 2) -- Sam Donaldson is scheduled to interview white separatist Randy Weaver, whose wife and son were shot by federal agents in August 1992 in Idaho. They return to Ruby Ridge on the day a U.S. Senate subcommittee is scheduled to begin hearings on the incident. ABC.
* "The Composers' Specials: Bizet's Dream" (7 p.m.-8 p.m., HBO) -- An unusual family series premieres with a tale that also teaches music appreciation. Georges Bizet (Maurice Godin) works on his best-known opera, "Carmen," while teaching a young student (Brittany Madgett) and worrying about his marriage.
* "Full Access: On Tour with George & Tammy" (8 p.m.-9 p.m., The Nashville Network) -- Once married, then turbulently divorced, George Jones and Tammy Wynette re-united on stage for a concert tour this year. This special marks their first television performance together since their professional reconciliation.
* "The 20th Century: The Search for Hoffa and Hughes" (10 p.m.-11 p.m., A&E Network) -- Host Mike Wallace re-examines the strange stories of labor leader Jimmy Hoffa, who disappeared in 1975, and eccentric millionaire Howard Hughes, who spent the last two decades of his life in mysterious seclusion.