Television personality Tom Bergeron researches his paternal roots in France and discovers his nine-times great grandmother, Marguerite, who endured upheaval and faced going against her Protestant upbringing in order to survive.

Bryan Cranston's happy childhood shattered when his father abandoned the family when Bryan was just 11. Seeking answers, Bryan explores his paternal roots, finds a troubling pattern of desertion, a man of honor and an aunt he never even knew existed.

This special episode digs into its archives and features highlights throughout the seasons including triumphs and tragedies, delightful discoveries and sobering moments. It also unveils outtakes and never-before-seen footage from the "Who Do" vault.

Alfre Woodard goes on a journey searching for her grandfather's roots, and finds a relative who endured one of the most horrifying periods in American history, but accomplished an extraordinary feat.

Author J.K. Rowling stumbles upon a family mystery on a journey to uncover her maternal French roots; a tale of wartime heroism and actions of a brave ancestor.

Actress Ginnifer Goodwin searches her family history in hopes of connecting her father with the grandparents he never knew; she is shocked to uncover lives filled with drug addiction and life-altering consequences.