CREATE TABLE table_22373 ("Episode" CLOB, "Broadcast date" CLOB, "Run time" CLOB, "Viewers  ( in millions ) " CLOB, "Archive" CLOB)

How many viewers watched the 16mm t/r episode?
SELECT "Viewers (in millions)" FROM table_22373 WHERE "Archive" = '16mm t/r'
SELECT "Viewers (in millions)" FROM "table_22373" WHERE "Archive" = '16mm t/r'