It looks like we don't have any Biography for David Ralston yet.
Full Frontal with Samantha Bee - Season 1
Full Frontal with Samantha Bee - Season 4
Full Frontal with Samantha Bee - Season 5
Full Frontal with Samantha Bee - Season 2
Full Frontal with Samantha Bee - Season 6
Full Frontal with Samantha Bee - Season 3
Full Frontal with Samantha Bee - Season 7