The Cowboys, at 6-4, are now tied for the NFC East and playing their best football of the season, but their narrow overtime victory against a 3-7 Redskins team shows that they can't afford to take anyone for granted.
After starting off the season 0-7, Miami has won three straight games, including a dominating 35-8 victory over the Buffalo Bills on Sunday.
QB Matt Moore, playing in relief of the injured Chad Henne, has turned a corner in the last three weeks, throwing for 6 TD's and only one INT and completing 70.8% of his passes.
He'll have a chance to play against a suddenly vulnerable looking Dallas secondary on Thursday, as the Cowboys allowed Rex Grossman to throw for 289 yards and march his team down the field for the tying touchdown at the end of regulation on Sunday.
However, the Dolphins defense, which gives up 251.1 passing yards a game, 25th in the league, isn't much better, while QB Tony Romo has been even hotter than Moore in the last few weeks.
After recovering from broken ribs he suffered in Week 2 of the regular season, Romo broke the Dallas team record for passing efficiency against Buffalo two weeks ago and threw for 3 TD's and no interceptions against Washington on Sunday.
The odds makers don't have that much faith in either QB though, as the over/under for Thursday's game is only 44 points.