The ensemble cast of criminals and professional assassins coming together with overlapping motives is enough to bring to mind Guy Ritchie's early ensemble gangster comedies, but the characters who seem most like they were just ripped out of one of his films are the British killers, Lemon and Tangerine.
Brian Tyree Henry (Lemon) and Aaron Taylor-Johnson (Tangerine) are both great in their roles as these fast-talking, heavily accented tough guys, but the best thing about them is their scenes with one another. The two are brothers and seem to have gone through everything in life together since growing up, including becoming hitmen who are comfortable performing the most violent acts money can pay for.
It's in their first scene together that we also learn about Lemon's obsession with "Thomas the Tank Engine." He goes so far as to keep a sticker sheet with all the characters from the show so that he can explain it to people and place stickers on them depending on which character he thinks they are. Tangerine thinks this is silly, and there are hilarious moments of the pair bickering about how relevant a kids show about trains is to their work as criminals.
But through all their brotherly frustration with one another, there's also a lot of love that lends the movie its few moments of real emotion. And that emotion is all thanks to the repartee the two have that makes us believe they love one another the way only brothers can.