CREATE TABLE table_38414 ("Character" CLOB, "Actor" CLOB, "Years" CLOB, "Series" CLOB, "Episode Count" FLOAT)

Which Years have a Character of dr trevor stewart?
SELECT "Years" FROM table_38414 WHERE "Character" = 'dr trevor stewart'
SELECT "Years" FROM "table_38414" WHERE "Character" = 'dr trevor stewart'