Alan Sigraff
From Tardis Wiki, the free Doctor Who reference
First Officer Alan Sigraff was Olivia Pamiec's father. He left her and his wife, after which Olivia began using her mother's surname instead.
During the journey to Ryklan, Sigraff was part of a mutiny against the innocent Captain Edith Medina, who was imprisoned afterwards. Before being killed by the Calendar Man, he wrote a confession and apologised to his family for leaving them. (AUDIO: The Calendar Man)
