Buddy constellations are a popular element for comedies and action films. Whole franchises (e.g. Lethal Weapon) use the dynamic between two characters in order to tell their plots and the concept succeeds as long as there is chemistry between the actors. And still, this narrative recipe was mostly reserved for male team-ups. Therefore, The Heat is a rare exception. Sandra Bullock and Melissa McCarthy have to work together in order to bring a drug cartel to justice and of course, not everything is fine between them. This and some more clichés can be found in the film but it is still worth a watch since it's a comedy that provides solid entertainment and some laugh-out-loud moments due to McCarthy's performance.

The US Blu-ray features two versions of the film. Next to the R-rated theatrical version, we have an unrated cut that doesn't offer a substantially better film. If you liked the theatrical version, you might enjoy some of the plot extension that the longer cut introduces since they add a little humor but they are not necessary to alter the film's overall impression.

Comparison between the Theatrical Version and the Unrated Cut (both included in the US Blu-ray/DVD combo set by 20th Century Fox).

12 differences, consisting of
7 extended scenes
3 scenes with alternate material
1 alternate dialogue
1 additional scene

The Unrated Cut runs 191.36 sec. or approx. 3 minutes 12 seconds longer than the Theatrical Version.

Extended Scene
0:08:57: Mullins asks the family man what is actually going on. He comes up with the silly explanation that he just wanted to give the hooker a ride because she looked sad. Mullins plays along and asks her without actually waiting for an answer. She then turns to the homeless man Bob who sits on the sidewalk in his dirty clothes and invites him to ride in the man's car and "piss and shit his pants" there.
37.28 sec.

Additional Scene
0:18:52: Mullins goes to Ashburn's car and destroys the side mirror. She walks away saying: "That's a shame.".
7.28 sec.

Extended Scene
0:23:28: The Theatrical Version has Ashburn going towards the bar a little longer while the UR introduces a new scene. Ashburn searches for the entry to the bar and asks a man standing nearby. As it turns out, he's urinating and Ashburn is repulsed by that. He then points in the direction of the front door and Ashburn goes there.
The UR runs 18.6 sec. longer

Alternate Dialogue
0:25:57: Drunk Patty has a different reply to Ashburn's sarcastic comment. In the UR, her choice of words is more vulgar.

Theatrical: "Eat my fucking Irish ass!"

UR: "Kiss my cunt, you twat!"
No time difference

Extended Scene
0:44:20: Mullins continues to change Ashburn's appearance by "fixing" her hair. That turns out to be rather difficult because Ashburn's hair stays the original way and, according to Mullins, makes Ashburn look like Darth Vader. She then applies the method of "fingerteasing" in order to curl the hair up a little and Ashburn reluctantly complies.
23.88 sec.

Alternate Material
1:13:05: As Ashburn confesses to Mullins that she's an orphan, both versions have a different take of Mullins' reaction to that. Contentwise, that's rather irrelevant, with the UR just adding Mullins' comment that this would explain a lot.
The UR runs 2 sec. longer

Extended Scene
1:13:14: Ashburn says that being an orphan also had its benefits. For example, they got a bag of toiletry from the local drug store for Christmas and were allowed on the mini golf course. Mullins is touched by that sad imagery.
30.32 sec.

Extended Scene
1:15:18: Ashburn and Mullins dance around a little more. When the song stops playing, Ashburn goes to the jukebox and wants to start it again but is stopped by one of the bar guests. The song already played 26 times and he's fed up with it. Mullins then rushes in and tells him that Ashburn is an orphan who only got Q-tips and tampons for Christmas and had a difficult life. Therefore, he should let her play the song. He finally gives in and Ashburn/Mullins continue their dancing.
41.92 sec.

Extended Scene
1:21:00: Ashburn interrupts Mullins' mother at the telephone. She isn't too happy about it but complies. Meanwhile, Mullins tells one of her Brothers that fighting off the gangsters with a baseball bat won't work because they'd surely not just shoot softballs at him. Another brother then yells into the neighborhood and apologizes to a female neighbor.
26.92 sec.

Alternate Material
1:25:49: The UR shows how blood exits the wound after Ashburn cuts it with the knife. The theatrical version omits that and shows earlier how Mullins avoids the sight of it in disgust.
The theatrical version runs 0.52 sec. longer

Alternate Material
1:26:00: Again, the theatrical version is more harmless by showing Mullins and Ashburn a little longer. This is to lessen the runtime difference in comparison to the UR that has another shot of Ashburn putting her finger into the man's bloody throat wound.
The UR runs 1.84 sec. longer

Extended Scene
1:46:50: Director Paul Feig can be seen in another shot as his physician character says: "What the fuck...".
1.84 sec.