[s10e4] Paper Moon -

Brit Sheridan as Kate and Emily Tennant as Tasha .

After Tasha turns more people and refuses to stop killing, Kate realizes her sister is too far gone and kills Tasha herself. Key Character Moments Supernatural, Season 10, Episode 4: Paper Moon [S10E4] Paper Moon

Sam and Dean take a break by a lake but are pulled into a case involving victims with slashed throats and missing hearts. Brit Sheridan as Kate and Emily Tennant as Tasha