Колин Стинтон
В роли: Self - Narrator (голос)

Lori Schappell
В роли: Self - Conjoined Twin

Reba Schappell
В роли: Self - Conjoined Twin

John Templeton
В роли: Self - Adjunct Professor of Pediatric Surgery, University of Pennsylvania

John Detre
В роли: Self - Neurologist, Hospital of the University of Pennsylvania (как Dr. John Detre)

Krista Hogan
В роли: Self - Conjoined Twin

Tatiana Hogan
В роли: Self - Conjoined Twin

Felicia Simms
В роли: Self - Krista & Tatiana's Mother

Doug Cochrane
В роли: Self - Pediatric Neurosurgeon, British Columbia's Children's Hospital

Melissa Buckles
В роли: Self - Jade & Erin's Mother

Kevin Buckles
В роли: Self - Jade & Erin's Father

Kurt Newman
В роли: Self - Surgeon in Chief, Children's National Medical Center (как Dr. Kurt Newman)

Jade Buckles
В роли: Self - Conjoined Twin

Erin Buckles
В роли: Self - Conjoined Twin

Michael Boyajian
В роли: Self - Surgeon (хроника)