Leonard asks Penny out on an impromptu romantic date.
When Stephen Hawking visits Caltech to give a lecture, Sheldon goes to great lengths for a chance to meet his hero in person.
After Bob and Abishola land in Lagos, they rush to rescue Dele from his dad's place; Auntie Olu and Uncle Tunde explore their old stomping grounds and realize things have changed since their last visit to Nigeria.
After months without a manager, Jann realizes she needs to take control of both her life and career, and decides to hire a personal assistant; she sits in on her sister's nanny interviews to poach the best assistant for herself.
With a traditional Nigerian wedding approaching, the Wheelers are formally introduced to Abishola's family. Abishola tries to keep the peace between her mother and Auntie Olu.
With auditions beginning for the three lead roles, tensions rise as the contestants all vie for the same parts; Gabby confronts Nick about his purposeful manipulation of the show; Mike accidentally reveals a huge secret to Nick and the producers.
Shaun and Lea's upcoming engagement party has everyone in a festive mood. A young single mother learns her son may have contracted his cancer from a surprising source.