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Haley's astrophysicist boyfriend comes to meet the family, setting Claire and Phil off in a competition about which one of them is smarter; Mitch and Cam go on a yoga retreat.

When Gloria's ex-boyfriend stops by for a visit, his striking resemblance to Manny makes Jay wonder; Phil agonizes over getting the perfect anniversary gift for Claire; Lily gets into a fight at school over bras.

Sheldon is required to attend Sunday school, but when he returns he decides to learn all he can about a multitude of religions.

Sheldon battles President Hagemeyer's mysterious boss over the university's science requirements; Mary discovers that Georgie is working at Meemaw's illegal gambling room.

When an airport worker is found dead of an apparent suicide, Graff and Bateman quickly deduce he has been murdered and may be responsible for a crime of his own.

From War Memorial Stadium in Laramie, Wyo.

As Abishola begins studying for medical school, she offends Gloria with an insensitive comment about Gloria's own journey of almost becoming a doctor; Tunde schools a reluctant Bob on the art of home repair while helping to fix his dishwasher.