CREATE TABLE table_18733480_1 (air_date VARCHAR, team_1 VARCHAR)

What is the original air date that had the wykeham wonderers as team 1?
SELECT air_date FROM table_18733480_1 WHERE team_1 = "Wykeham Wonderers"
SELECT "air_date" FROM "table_18733480_1" WHERE "Wykeham Wonderers" = "team_1"