Countdown to the series finale: 23 days

The Decision Reverberation Season 12, Episode 20 -  Airs April 25, 2019

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Koothrappali is worried people won’t take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Also, Leonard wants to be the principal investigator on a plasma physics study.

Guest Stars: Joshua Malina as President Siebert, Rati Gupta as Anu, David Theune as Dr. Graybel, Angela Lin as Maritza, Elijah Isaiah Cook as Terry

Writers: Steven Molaro (Story), Steve Holland (Story), Tara Hernandez (Story), Eric Kaplan (Teleplay), Maria Ferrari (Teleplay), Jeremy Howe (Teleplay)

Director: Mark Cendrowski

Episode Notes