CREATE TABLE table_17676 ("Character" TEXT, "Portrayed by" TEXT, "Main cast seasons" TEXT, "Recurring cast seasons" TEXT, "# of episodes" FLOAT)

How many people named Nick Lucas are on the show?
SELECT COUNT("Portrayed by") FROM table_17676 WHERE "Character" = 'Nick Lucas'
SELECT COUNT("Portrayed by") FROM "table_17676" WHERE "Character" = 'Nick Lucas'