CREATE TABLE table_73153 ("#" FLOAT, "Episode" TEXT, "UK air date" TEXT, "Timeslot" TEXT, "Viewers  ( millions ) " TEXT, "Audience share in timeslot" TEXT)

Name the uk air date for audience share in timeslot in 7.3%
SELECT "UK air date" FROM table_73153 WHERE "Audience share in timeslot" = '7.3%'
SELECT "UK air date" FROM "table_73153" WHERE "Audience share in timeslot" = '7.3%'