He continued to work steadily , though he did not appear as a regular on any successful television series until his appearance on Three 's Company in 1979 .
After making How to Frame a Figg , Knotts ' five - film contract with Universal finished .
Knotts continued to work steadily , though Knotts did not appear as a regular on any successful television series until Knotts ' appearance on Three 's Company in 1979 .
After making How to Frame a Figg , Knotts ' five - film contract with Universal finished .