Fans of Knots Landing (10 p.m., WTVT-Channel 13) watched Greg Sumner(William Devane) being shot in the closing moments of last week's episode. This week, he is rushed to the hospital in critical condition and Mack (Kevin Dobson) decides that Tom Ryan (Joseph Gian) is the sniper. Robin Strasser, a former Emmy winner for One Life to Live, joins the cast this week as the producer of Open Mike, Karen's (Michele Lee) talk show. Chris Lemmon, who has just left the Fox series Open House, joins the cast next week as Strasser's associate producer on the show. Adam Arkin guests this week as Mark Baylor, a
convicted felon who considers telling what he knows about the mysterious Oakman Industries - which Sumner's daughter was investigating when she was murdered. Also this week on the soap: Olivia and Michael (Tonya Crowe, Patrick Petersen) consider sharing an apartment, Gary (Ted Shackelford) returns the twins to Val (Joan Van Ark) and Linda Fairgate (Lar Park-Lincoln) gets a job at Sumner Corporation.