In the latest episode of Criminal Minds: Evolution, titled "Piranha," the BAU
team grapples with a blast from the past that throws Agent Rossi's world into a
whirlwind. The episode dives deep into Rossi's personal life, revealing a
connection that has been alluded to for seasons but never fully explored - his
relationship with Dr. Jill Gideon, the ex-wife of the BAU's former profiler,
Jason Gideon.

The episode kicks off with Prentiss approaching Rossi about bringing in Dr. Jill Gideon to assist with the case. A paper Rossi co-authored with Gideon years ago seems to be linked to the UnSub's motives. However, Rossi vehemently opposes the idea, hinting at a painful past between him and Jill.
We learn that Jill has moved on from the world of criminal profiling, leaving behind the emotional toll it took. However, Prentiss, aware of Jill's expertise and her past connection to Gideon, convinces her to return - albeit through some manipulation.
The episode's climax arrives when Jill walks into what used to be Gideon's office, now occupied by Rossi. The surprise reunion leaves both characters speechless.
This revelation sheds light on a previously unknown aspect of Rossi's past. Actors Joe Mantegna and Felicity Huffman, portraying Rossi and Jill respectively, describe their characters' relationship as a complex one, mirroring the dynamic of the classic film "Pat and Mike." There's a mix of love, resentment, and unresolved issues that promise an intriguing storyline going forward.
Mantegna expresses his enthusiasm for this new development, especially considering the show's long run. He believes exploring the characters' personal lives adds depth and allows viewers to connect with them on a deeper level.
The episode also hints at the potential impact Jill might have on Rossi, particularly considering his recent struggles with PTSD. Felicity Huffman confidently states that Jill will play a crucial role in Rossi's life, suggesting a dynamic that could be both supportive and challenging.
"Piranha" goes beyond the typical criminal case structure. It delves into the ripple effects of past actions, showcasing how seemingly good intentions can have lasting consequences. The introduction of Jill opens a new chapter in Rossi's life, one filled with unresolved emotions and the potential for growth.
This episode serves as a satisfying exploration of Rossi's past while setting the stage for a captivating storyline in the coming episodes. Fans can look forward to seeing how Jill's presence affects the BAU team dynamic and how Rossi grapples with the ghosts of his past.