Clay O'Brien

1970s

1. 1976

   The Whiz Kid and the Carnival Caper

   Movie

2. 1975
   

   Mackintosh and T.J.

   T.J.

3. 

   The Apple Dumpling Gang

   Bobby Bradley

   62
4. 1974
   

   Little House on the Prairie

   Henry Henderson · 1 episode

   77

5. Hog Wild

   Sterling Melborne

6. 1973
   

   Cahill: United States Marshal

   Billy Joe Cahill

   63

7. One Little Indian

   Mark

8. 1972

   Climb an Angry Mountain

   Michael Cooper

9. 

   The Cowboys

   Cowboy Hardy Fimps

   69

1960s

1. 1969
   

   Marcus Welby, M.D.

   Peter Graham · 1 episode

   69

1950s

1. 1955
   

   Gunsmoke

   Tuttle Kincaid, Caleb Cunningham · 2 episodes

   77