Criminal Minds
Dr. Spencer Reid's (Matthew Gray Gubler) mother Diana (Jane Lynch, pictured here) surprisingly delivers a huge break in her son's case in “Criminal Minds” Season 12, episode 20. CBS

“Criminal Minds” finally returns to CBS with the last three episodes of Season 12 on Wednesday, April 26 at 9 p.m. The plot will now focus on Dr. Spencer Reid (Matthew Gray Gubler) who is currently in prison for allegedly killing a doctor in Mexico.

In Season 12, episode 19, Dr. Tara Lewis (Aisha Tyler) visited Reid in jail and urged him to remember the events that led him to being framed for the doctor’s murder. In a surprising twist, the profiler remembered that it was a woman that framed him and not Mr. Scratch (Bodhi Elfman).

What will happen next? “Criminal Minds” showrunner Erica Messer told TVLine that in Season 12, episode 20, Reid’s mother Diana (Jane Lynch) visits her son in prison and indirectly delivers a huge break in his case.

Interestingly, in the same episode, titled “Unforgettable,” series star Joe Mantegna’s daughter Gia reprises her Season 3 role as Lindsey Vaughn. Messer did not reveal any details regarding why she’s back.

READ: Lindsey Vaughn returns To “Criminal Minds” in Season 12, episodes 20 and 21.

Moreover, the final two episodes of “Criminal Minds” will focus entirely on Reid and give a satisfying end to the journey he has been on since the second half of Season 12.

The synopsis of the upcoming episode states that several federal government employees will succumb to symptoms of a heart attack. The Behavioral Analysis Unit (BAU) will be called to investigate the case while Reid awaits his trial date. The case quickly becomes personal for newbie Stephen Walker (Damon Gupton) after his close friend also suffers from the same symptoms.

After episode 20, episodes 21 and 22, which are titled “Green Light” and “Red Light” respectively, will air on May 3 and May 10. The Season 12 finale will end on a cliffhanger. Also, Shemar Moore returns as Derek Morgan.

“Criminal Minds” airs Wednesdays at 9 p.m. EDT on CBS.