Who murdered hubby?
''Mortal Thoughts'' is not always plausible, nor is it particularly surprising when it wants to be, but this murder/mystery doesn't bore, and there are some nice performances by Demi Moore, Glenne Headly and Ms. Moore's star husband, Bruce Willis. Ms. Moore and Ms. Headly play good friends who are questioned about the death of Mr. Willis, who plays Ms. Headly's abusive husband. Harvey Keitel is the police detective who questions the two women. Language, sex, violence. Rating: R ** A delightfully funny version of the Czech playwright/president Vaclav Havel's excellent sociological farce, "The Increased Difficulty of Concentration," is being performed in the Studio Theatre at Towson State University. Part of the TSU/Theatre Project Experimental Theatre Festival, the two-act play centers on the frenzied activities of Huml, an intellectual trying to survive in a highly mechanized and repressive society. The student cast, headed by Joey Scherr, shines in all roles. 8 p.m. Fine Arts Center, Osler and Cross Campus drives. Tickets: $8/$5. 830-ARTS.
The lure of the waterway
In rivers and oceans we see "the ungraspable phantom of life," wrote Herman Melville in "Moby Dick." That fascination with, and connection to, the waters around us provides the lure of a new 13-part series premiering tonight on Maryland Public Television. "On the Waterways" (at 9, channels 22 and 67) is hosted by Jason Robards and offers a look at the people and issues of shoreline North America. Tonight's debut is set on the North Atlantic coast, but a future show spends time in the Chesapeake Bay. Robards, by the way, can also be seen this weekend as Abraham Lincoln in a new ABC movie, "The Perfect Tribute" (at 9 p.m. tomorrow, Channel 13).