question: Who was the home team on 4 February 1987 when Luton Town was away team and there was no replay?
answer: SELECT home_team FROM table_name_68 WHERE tie_no = "replay" AND date = "4 february 1987" AND away_team = "luton town"
context: CREATE TABLE table_name_68 (home_team VARCHAR, away_team VARCHAR, tie_no VARCHAR, date VARCHAR)