[s10e21] The Separation Agitation -

In a parallel storyline, the gang’s geologist friend, , introduces them to his new, younger girlfriend, Rebecca .

For more details on the cast and crew, you can check the episode's entry on IMDb or read the full recap on Entertainment Weekly . The Big Bang Theory - The Separation Agitation - IMDb [S10E21] The Separation Agitation

: Howard and Raj return to provide the theme music, adding a theatrical flair to Sheldon and Amy’s vlog. In a parallel storyline, the gang’s geologist friend,