Perhaps there is a threat that involves both criminal elements and dangerous natural phenomena. The FBI agents from Numb3rs work with the Tracy family from Thunderbirds. The Numb3rs characters can use their data analysis and crime - solving skills, while the Thunderbirds use their amazing vehicles and rescue capabilities. For example, they could be dealing with a group of thieves who are stealing valuable resources during a series of earthquakes.
Charlie from Numb3rs could have some interesting discussions with Brains from Thunderbirds. They are both brilliant minds, so they might exchange ideas about engineering and mathematics. Charlie could offer some new theoretical concepts, and Brains could show Charlie some of his amazing inventions.
Criminal Minds and Numb3rs crossover fanfiction can be really interesting. It often combines the crime - solving aspects of both shows. In such fanfictions, the characters from Criminal Minds, with their expertise in profiling criminals, might team up with the mathematicians from Numb3rs. This can lead to unique storylines where they use both psychological profiling and mathematical models to solve complex cases.
One idea could be to cross Numb3rs with a detective show like Sherlock. Have Sherlock's deductive skills combined with the math - based crime solving in Numb3rs. Maybe they could solve a case that involves a complex mathematical code that only the combined efforts of both can crack.
One common theme is the combination of different forms of intelligence. Criminal Minds is about psychological intelligence in profiling, and Numb3rs is about mathematical intelligence. So, in the fanfiction, they often come together to solve crimes that neither could solve alone.
First, decide which two (or more) universes you want to cross. For example, if it's Numb3rs and a superhero universe, think about how the math skills from Numb3rs can interact with the superpowers. Then, create a basic plot. Maybe the superhero is having trouble with a villain who uses math - based traps, and the Numb3rs characters come to the rescue.
In fanfiction, if Amita was kidnapped, it could lead to a high - stakes rescue mission. Maybe Charlie would use his math skills to analyze the kidnapper's patterns. For example, if there were ransom demands with specific numbers or time frames, Charlie could find hidden meanings. He might look at the geographical locations where the messages came from and calculate the most likely hiding places. The FBI team would surely be on high alert, with Don leading the investigation and coordinating with Charlie.
In some 'Numb3rs' Charlie Hurt fanfiction, the author might take a different turn and explore his family relationships more deeply. Maybe there's a story where Charlie has to deal with an old family secret that comes to light and how it affects his work and relationships with his colleagues.
The math genius from Numb3rs might fit into Ravenclaw. Ravenclaw values intelligence and knowledge, and a character with strong math skills would surely thrive there with all the academic pursuits and the love for learning in that house.
Well, crime - solving from a different perspective can be a common theme. Writers might imagine how the Numb3rs team would handle a case if they had different resources or if the crime had a very unusual modus operandi. Additionally, character - centric themes such as Charlie's struggle with the ethical implications of using math in crime - fighting are also popular. And some fanfictions play with the idea of alternate universes where the characters have different occupations or personalities but still retain some of their core traits from the show.