Season 21 Episode 10 (February 6, 2018): Family, Part Two

Season 17 Episode 10 (January 31, 2014): Fraternity: Part 2

Season 21 Episode 5 (January 22, 2018): A Special Relationship, Part One

Season 20 Episode 5 (January 16, 2017): Remembrance, Part One

Season 20 Episode 3 (January 9, 2017): Discovery, Part 1

Season 17 Episode 1 (January 2, 2014): Commodity: Part One

Season 16 Episode 2 (January 11, 2013): Change: Part 2

Season 15 Episode 9 (April 29, 2012): Fear (1)

Season 14 Episode 7 (January 24, 2011): Bloodlines: Part 1