“William, you tricky duck.”

following the Revolutionary War on a new episode of PBS seriesFinding Your Roots.

See the dramatic, deeply personal moment in the exclusive clip below.

Kristen Bell is shocked on ‘Finding Your Roots’

Kristen Bell on ‘Finding Your Roots’.Credit:PBS

To this, the actress quipped, “William, you tricky duck.”

TheNobody Wants Thisactress has been open about her immediate family over the years.

Their father is a recovering addict, and he drank non-alcoholic beer when they were little.

‘Finding Your Roots’ digs into Kristen Bell’s ancestry

‘Finding Your Roots’ digs into Kristen Bell’s ancestry.Amanda Edwards/Getty

So I think it feels to her like something special, something daddy, something family."

Bell and Shepard will both appear inFinding Your Rootson Tuesday , Feb. 18, at 8 p.m.