CREATE TABLE table_19834691_4 (uk_air_date VARCHAR, audience_share_in_timeslot VARCHAR)

Name the uk air date for audience share in timeslot in 7.3%
SELECT uk_air_date FROM table_19834691_4 WHERE audience_share_in_timeslot = "7.3%"
SELECT "uk_air_date" FROM "table_19834691_4" WHERE "7.3%" = "audience_share_in_timeslot"