Since I don't know the specific 'Catch If You Can True Story', it's difficult to say. But it could be a detective and a criminal.
There's no way to be certain without more details about this 'Catch If You Can True Story'. However, common main characters in such a story could be the pursuer, who might be a law enforcement officer or someone with a vested interest in catching someone. And the other main character would be the person or thing being chased, perhaps a wrongdoer or a valuable object that has been lost or stolen.
In a 'Catch If You Can True Story', the main characters could vary greatly. It might be a team of bounty hunters as the pursuers. And the ones they are chasing could be a group of escaped prisoners. Or it could be a wildlife biologist as the main character trying to catch an endangered species for tagging and study, with the animal being the other main 'character' in a sense. Another possibility is that the main characters are two rivals in a business or a game, where one is trying to catch the other out in a mistake or a strategic move.
Since we don't know the exact story, it could be a detective as the main character if it's a crime - related story.
The main character is Frank Abagnale Jr. He is the one who carried out all those elaborate cons.
The two main characters are Frank Abagnale Jr. and Carl Hanratty. Frank is the con artist who uses his intelligence to create false identities and commit fraud. Carl is the FBI agent who is determined to catch Frank and put an end to his illegal activities.
The main character is Frank Abagnale. He is the con artist around whom the story revolves.
Since it's based on a true story about catching a killer, there would probably be law enforcement agents as main characters. There might also be witnesses who play important roles, as their testimonies could be crucial in the investigation. And perhaps there's a character representing the killer, even if not always in the spotlight, whose actions and motives are gradually uncovered throughout the story.
The main characters are Frank Abagnale and Carl Hanratty. Frank is the con artist who pulls off all those amazing deceptions. Carl is the FBI agent who is determined to catch him.
The main characters are Frank Abagnale Jr. and Carl Hanratty. Frank is the con artist and Carl is the FBI agent who is after him.
Since I don't know the exact story, it could be a cat and a mouse. The mouse is always trying to outwit the cat and the cat is always saying 'catch you if I can'.
The main characters are most likely the mice. There could be a particularly fast or mischievous mouse that is the one to be caught and the other mice that are trying to catch it.
The main characters are Frank Abagnale Jr. and Carl Hanratty. Frank Abagnale Jr. is the con artist who uses his wits to deceive people and live a life of false identities. Carl Hanratty is the FBI agent determined to catch him.