More, more, more on The Weekend Watch:
* Joan Rivers must have spent a fortune on wardrobe to do the hosting chores on tomorrow night's "Showtime Comedy Club All-Stars V" special on the premium cable network (at 11 o'clock, with repeats June 4, 9, 13 and 19). Too bad she didn't spend more on material.
Rivers is in a new outfit every time we see her, in an opening monologue and then introducing each of the five comics chosen as this year's best from the monthly comedy club series. Her material seems trademark stuff, however, from digs at Cher, Madonna and Queen Elizabeth to her familiar self-deprecation. (Example: "Do you know what it's like to go to a shoe store for a pair of flats and be told, 'you already have them?'")
Oh well, the point of these shows is to highlight up-and-coming young comics, and the list this time includes Fred Greenlee, Michelle Beaudry, Ron Shock, Tommy Blaze and Kenny Rogerson.
There are laughs from all five, along with the usual level of crudity that some may find offensive. Blaze and Greenlee have the most polished material.
* Cable mogul Ted Turner, who wears his environmental conscience on his sleeve, seems to be trying to out-PBS public TV's traditional role as a nature study center. Two more documentaries on basic cable Turner networks this weekend emphasize the point.
On TNT at 8 p.m. Sunday, the eloquent Sir David Attenborough unveils a new six-part series, "The Trials of Life" (nightly at 8 through next Friday), which helps round out his earlier renowned natural studies, "Life on Earth" and "The Living Planet." This series concentrates on the fascinating survival tactics adopted by a variety of creatures.
Also Sunday on Turner superstation TBS (at 9 p.m.), "National Geographic Explorer" dives into the ocean to explore the myth and reality of "Creatures of the Deep." The two-hour show, hosted by Bob Ballard, includes some material on the Loch Ness Monster legend, and segments on whales, giant octopuses, stingrays, sleeping sharks and the prehistoric coelacanth.
* Baltimore has been at the center of the developing medical controversy about AIDS-stricken health providers, what with last winter's revelation that a Johns Hopkins Hospital surgeon died of the disease and the similar recent findings about a dentist at the Maryland Penitentiary. Thus a scheduled segment on AIDS and the medical community makes "CBS Sunday Morning" (9 a.m., Channel 11) of particular interest this weekend.
* With a new Norman Lear comedy, "Sunday Dinner," making its debut Sunday (at 8 p.m., Channel 11), CBS is launching a six-week run of "best-of" episodes of Lear's groundbreaking "All In the Family," following the new show at 8:30 p.m.