Unusual, dynamic model-turned-actress who followed her film debut in John Huston's "Fat City" (1972) with a memorable, Oscar-nominated performance in George Lucas's seminal coming-of-age film, "American Graffiti" (1973). Clark's subsequent career, however, has not lived up to her fine work of the 1970s in such films as "The Man Who Fell to Earth" (1976) and "When You Coming Back, Red Ryder?" (1978) and her country turns in the TV films, "Amateur Night at the Dixie Bar and Grill" (1979) and "Rodeo Girl" (1980). She has appeared mostly in fairly obscure or routine genre fare, from "National Lampoon Goes to the Movies" (1982) to "Stephen King's Cat's Eye" (1985) and several appearances as mothers ("Radioland Murders" 1994, "Buffy the Vampire Slayer" 1992).

  The Big Empty (2005) .... Mother
The Month of August (2002) .... Tina
Cherry Falls (2000) .... Marge Marken

Niagara, Niagara (1997) .... Sally
... aka Niagra Niagra (USA)
"Baywatch Nights"
... aka Detectives On the Beach
- Just a Gigolo (1995) TV Episode .... Julie Young
Radioland Murders (1994) .... Billy's Mother
Buffy the Vampire Slayer (1992) .... Buffy's Mom
The Price She Paid (1992) (TV) .... Marlene
... aka Plan of Attack
Original Intent (1992) (V) .... Jessica Cameron
Deuce Coupe (1992) .... Jean Fitzpatrick
Cool as Ice (1991) .... Grace Winslow
"Father Dowling Mysteries"
... aka Father Dowling Investigates (UK)
- The Passionate Painter Mystery (1990) TV Episode .... Iris Blackman

The Blob (1988) .... Fran Hewitt
"St. Elsewhere"
- Their Town (1988) TV Episode .... Harry
Blind Curve (1988) .... Mimi
"Matlock"
- The Country Boy (1987) TV Episode .... Kitty Carroll
"The Hitchhiker"
... aka Voyageur, Le (France)
- Secret Ingredient (1987) TV Episode
"Magnum, P.I."
- Straight and Narrow (1986) TV Episode .... Leslie Emory aka 'Scooter'
- The Hotel Dick (1985) TV Episode .... Leslie Emory
"Hunter"
- Crime of Passion (1986) TV Episode .... Jody Stone
"Starman"
- Like Father, Like Son (1986) TV Episode .... Shannon McGovern
Popeye Doyle (1986) (TV) .... Corinne Evans
"Simon & Simon"
- Act Five (1986) TV Episode .... Cotton
At Close Range (1986) .... Mary Sue
Cat's Eye (1985) .... Sally Ann (segment "The General")
... aka Stephen King's Cat's Eye
Hambone and Hillie (1984) .... Nancy Rollins
Amityville 3-D (1983) .... Melanie
... aka Amityville III: The Demon
... aka Amityville: The Demon
Blue Thunder (1983) .... Kate
... aka Blue Thunder the Movie (UK: video box title)
Cocaine and Blue Eyes (1983) (TV) .... Ruthann Gideon
Johnny Belinda (1982) (TV) .... Julie Sayles
"Faerie Tale Theatre"
... aka Shelley Duvall's Faerie Tale Theatre (USA)
- The Tale of the Frog Prince (1982) TV Episode .... Queen Gwynneth/Candy
Q (1982) .... Joan
... aka Q: The Winged Serpent
... aka Serpent
... aka The Winged Serpent
National Lampoon Goes to the Movies (1982) .... Susan Cooper ("Growing Yourself")
... aka National Lampoon's Movie Madness (UK: video title)
Nobody's Perfekt (1981)
Rodeo Girl (1980) (TV) .... J.R. Patterson
Where the Ladies Go (1980) (TV) .... Charlene

More American Graffiti (1979) .... Debbie Dunham
... aka Purple Haze
When You Comin' Back, Red Ryder? (1979) .... Cheryl
Amateur Night at the Dixie Bar and Grill (1979) (TV) .... Sharee
The Big Sleep (1978) .... Camilla Sternwood
Handle with Care (1977) .... Electra
... aka Citizen's Band
... aka The Great American Citizens Band
I Will, I Will... for Now (1976) .... Sally Bingham
The Man Who Fell to Earth (1976) .... Mary-Lou
James Dean (1976) (TV) .... Chris White
... aka The Legend
"Insight"
- Ginny (1974) TV Episode (as Candace Clark) .... Ginny
"Banacek"
- No Stone Unturned (1973) TV Episode (as Candace Clark) .... Gretel
American Graffiti (1973) .... Debbie Dunham
Fat City (1972) .... Faye