History Film / TheOldGuard

* EvenEvilHasStandards: After capturing Nicky and Joe, several of the mercenaries are refusing to let Joe comfort Nicky. When Joe pleads to the mercs, one mocks them, questioning if Nicky is his boyfriend, prompting Joe to explain he's ''much'' more than that, before the two share a kiss. The merc looks at them with clear guilt, upon realising they actually ''are'' gay and genuinely in love. Adding to matters, the other mercs laughed when he made the comment, but become silent and awkward when they realise the two's sexuality and genuine love for one-another, as they too are uncomfortable with how insulting their casual homophobia was. [[spoiler:Doesn't spare them from the two's wrath when they try to stop them kissing, though.]]

* TechnologyMarchesOn: InUniverse. In centuries past, it was easier for the team to fly below the radar. The twenty-first century, however, has lead to an increase in the ubiquity of modern surveillence systems and record-keeping, not to mention smartphones. Andy at one point offers to take a photo of a group of vacationers just so she can delete the picture one of them just took which had her in the background.

Turns out, living in the modern era is a challenge none of the four envisioned, and staying hidden is becoming increasingly difficult as records become more comprehensive and social media becomes omnipresent. Tired from nearly endless fighting, Andy reluctantly agrees to do a second job for an old contact (Creator/ChiwetelEjiofor), intending to take some time off afterward. But things are not what they seem, and the old warrior has to deal with unexpected fallout, as well as the awakening of a new immortal (Kiki Layne), the first in nearly two hundred years.

* TheBabyOfTheBunch: Nile is the youngest immortal, who had only experienced her first death at the beginning of the film.

** Andy uses a ''labrys'', a double-headed axe used in the time of Ancient Greece.

* RealityEnsues: [[spoiler:As Andy is taking Nile out of Afghanistan, Nile correctly points out that she's now technically AWOL. By the end of the film, Copley has set up a plan that will "prove" she was killed in action.]]

* AdaptationalNameChange: [[spoiler:Noriko is renamed to Quynh, according to her different heritage.]]

* EvenEvilHasstandards: After capturing Nicky and Joe, several of the mercanaries are refusing to let Joe comfort Nicky. When Joe pleads to them one makes fun of them, questioning if he's his boyfriend, prompting Joe to explain he's ''much'' more than that. The merc looks at them with clear guilt, as while he was OK making a joke like that when he assumed the two were straight, but upon realising they actually ''are'' gay, he clearly regrets using homophobic language. Adding to matters, the other mercs laughed when he made the comment, but become silent and awkward when the realise the two's sexuality and genuine love for one-another, as they too are uncomfortable with how homophobic they came across as.

* CatapultNightmare: Nile suffers one thinking of the man she killed.

* AndIMustScream: [[spoiler:Quynh was locked in an iron sarcophagus and dumped into the Atlantic ocean. Quynh is immortal. That's not a good combination.]]

* CarCushion: [[spoiler: Nile tackles Merrick out a window, the pair slamming into a car several dozen stories below.]]

* TheFogOfAges: Andy is so old that she can't remember her age, or what the members of her family looked liked.

* ImmortalHero: The immortals intervene in different conflicts trying to good and have had an immeasurable impact on the world. The villain are regular mortals trying to harness immortality for their own purposes.

* TheOlderImmortal: Andy is much older than the rest of the immortal, though she won't give her exact age.

* ReluctantWarrior: Nile takes a life for the first time after shooting a enemy combatant who has hiding in an Afghan village. She feels incredibly uncomfortable with killing [[spoiler: and temporarily leaves the team because she can't bring herself to kill another person. Nile only changes her mind when she realizes that Andy is in legitimate danger because Booker betrayed her]].

* BroughtDownToNormal: Each immortal knows that at one point or another, it will simply "switch off" and they'll die like anyone else. When [[spoiler: Andy keeps bleeding from a gunshot wound, it appears as if her time has come. It turns out it's just a fluke slow-healing wound and Andy is soon back to her "normal" self.]]

* BeenThereShapedHistory: Andy assumes nothing she does matters but Copley's research shows that she has saved numerous lives who in turn aid others or have descendants who do.
-->'''Copley''': She saves a life and two, three generations later, we all reap the benefits.

* FaceHeelTurn: [[spoiler:Booker betrays the team because he wants to die and hopes medical science will find an way.]]

* AdaptationalIntelligence: Of a technological sort. In the comic, it's showcased that only Booker (the "youngest" of the group) has any understanding of modern technology (Andy barely understands how to use an old flip-phone, let alone a smart one). Indeed, the comic has Nile [[spoiler: realizing Booker is the mole]] as Andy doesn't grasp that "just because you have a computer doesn't automatically mean you're on the Internet." In the film, all of the group are shown to be tech-savvy with Andy easily using a smartphone (which makes sense as they long used to adapting to the times they live in).

* TechnologyMarchesOn: In centuries past, it was easier for the team to fly below the radar. The twenty-first century, however, has lead to an increase in the ubiquity of modern surveillence systems and record-keeping, not to mention smartphones. Andy at one point offers to take a photo of a group of vacationers just so she can delete the picture one of them just took which had her in the background.