
Acting
Joan Van Ark (born June 16, 1943) is an American actress, most notable for her role as Valene Ewing, which she originated on the CBS hit series Dallas and continued for thirteen seasons on its long-running spin-off, Knots Landing. Van Ark has also received a Theatre World Award and been nominated for a Tony Award for her stage work.
Description above from the Wikipedia article Joan Van Ark, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Psycho Wedding Crasher
as Aunt Daisy

Watercolor Postcards
as Momma

Channels
as Megan Phillips
Diamond Zero
as The Hemingway Diamond

Net Games
as Dr. Klein

Tornado Warning
as Mayor McAnders

UP, Michigan!
as Deborah Michaels

Held for Ransom
as Nancy Donavan

It's the Pied Piper, Charlie Brown
as Secretary (voice)

Loyal Opposition
as Vice President Elizabeth Lane

Doom Patrol
as Mrs. Franklin · 1 ep.

Archer
as Ruth (voice) · 1 ep.

RuPaul's Drag Race
as Self - Guest Judge · 1 ep.

Celebrity Ghost Stories
as Self · 1 ep.

My Name Is Earl
as Janine · 1 ep.

Nip/Tuck
as Annette Wainwright · 1 ep.

Son of the Beach
1 ep.

Twice in a Lifetime
as Camilla Bianco / Anna · 1 ep.

Knots Landing: Back to the Cul-de-Sac
as Valene Ewing · 2 ep.

Adventures from the Book of Virtues
as Queen Esther (voice) · 1 ep.