Table:
text: 1966 Denver Broncos season
Regular season
Regular season
Week Date_ Opponent Result_ Game_site Record Attendance
1 September 3, 1966 at Houston Oilers L 7–45 Rice Stadium 0–1 30156
3 September 18, 1966 Boston Patriots L 10–24 Bears Stadium 0–2 25337
4 September 25, 1966 New York Jets L 7–16 Bears Stadium 0–3 29878
5 October 2, 1966 Houston Oilers W 40–38 Bears Stadium 1–3 27203
6 October 8, 1966 at Kansas City Chiefs L 10–37 Municipal Stadium 1–4 33929
7 October 16, 1966 at Miami Dolphins L 7–24 Miami Orange Bowl 1–5 23393
8 October 23, 1966 Kansas City Chiefs L 10–56 Bears Stadium 1–6 26196

Question: Who was the Denver Broncos' 1966 season opponent in Week 4?