It was a close one. A very close one. But after a tight contest, The Dark Knight once again emerged as the box office winner this weekend.

Although it initially appeared as if The Mummy: Tomb of the Dragon Emperor was going to bring Batman down, the three-quel lost steam at the end. The film, which grossed $40.4 million over the past three days, narrowly lost out to Knight and wound up being the lowest performer in its series. (The Mummy opened at $43.4 million in 1999 while The Mummy Returns scored $68 million in 2001.)

Here are a few other newsworthy box office notes:

• If we were to combine the numbers from both Dragon and Journey to the Center of the Earth, Brendan Fraser would be the biggest grosser this weekend.
• The Dark Knight is just now days away from reaching the $400 million mark. (It currently stands at $393 million.)
• The X-Files plummeted five spots in just one week. The movie has now raked in a disappointing $17 million domestically.

1. The Dark Knight, Warner Bros., $42,664,219 (avg. $10,001)
2. The Mummy: Tomb of the Dragon Emperor, Universal, $40,457,770 (avg. $10,760)
3. Step Brothers, Sony, $16,506,526 (avg. $5335)
4. Mamma Mia!, Universal, $12,615,515 (avg. $4120)
5. Journey to the Center of the Earth, Warner Bros., $6,662,406 (avg. $2916)
6. Swing Vote, Disney, $6,230,669 (avg. $2815)
7. Hancock, Sony, $5,087,756 (avg. $1829)
8. Wall-E, Disney, $4,603,179 (avg. $1802)
9. The X-Files: I Want to Believe, 20th Century Fox, $3,385,878 (avg. $1063)
10. Space Chimps, 20th Century Fox, $2,720,177 (avg. $1275)

(You can review last week’s numbers here.)