Andrew Tinpo Lee

When Kate's niece Meg and her best friend are kidnapped, the BAU suspects an online predator engaged in sex trafficking. Greg Grunberg guest stars.

Randall and William take a road trip to Memphis, where Randall learns about his biological father's past.

While McGarrett helps his visiting sister, Mary (Taryn Manning), spy on her shady neighbors, Five-0 investigates the murders of a ride-share driver and his passenger. Also, the team teases the youngest members of Five-0 when Junior escorts Tani to a wedding.

Sam's former partner, Ruiz, goes missing while buying an explosive during an undercover operation.

Christy convinces herself that everything is fine even though her family is basically homeless. Surprisingly, Bonnie is the one who tries to bring her back to reality.

While Magnum and Higgins reunite and work the case of a construction worker's tragic death, TC and Shammy get skyjacked by a pair of drug runners posing as tourists.