- Previous episode S12E19 - The Inspiration Deprivation
- Number S12E20
- Director Mark Cendrowski
- Writers Steve Holland, Steven Molaro, Tara Hernandez
The Decision Reverberation
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.