Dr. Howell
Background
Howell is a medical doctor on The Walrus in the West Indies.
During the events of Black Sails: Season 1 Episode 1 I. played by Alistair Moulton Black
After a battle, Dr. Howell tells Captain Flint that Mr. Duffy has died.
During the events of Black Sails: Season 1 Episode 7 VII. played by Alistair Moulton Black
De Groot and Dr. Howell hold back Randall from attacking John Silver. De Groot tells Silver that the ship's council voted Randall off the crew. Randall Tells De Groot and Howell that Silver stole the page and not Singleton. De Groot tells Dufresne what Randall told him. Howell suggests they keep the information from the crew so that they can continue with their hunt of the Urca. Dufresne, De Groot and Howell go to get Silver after he fails his test and Silver pulls a knife on De Groot, who pulls his own knife out. Randall then starts calling everyone a thief.
During the events of Black Sails: Season 1 Episode 8 VIII. played by Alistair Moulton Black
As The Walrus is going through a storm, Dr. Howell gives Silver a fake leg for Randall to wear. The Walrus and Ranger arrive at Division Bay and Flint briefs his crew. Once they get view of the bay. no ship is there. Logan spots sails and yells it to the crew and yells out that the ship is a Man-o'-War. Silver yells at the Man-o'-War that they are being followed by a pirate ship and points at the Ranger. He tells the Spanish Officer where they came from and the Man-o'-War continues on its way. As Flint is about to give the order to fire on the Man-o'-War, Dufresne pulls a pistol on him and accuses him of tyranny against the crew. Dufresne holds up the letter Gates gave him which details Flint's crimes against the crew. As Flint goes to fire a cannon, Dufresne shoots him. Silver fires one of the cannons at the Man-o'-War and Flint tells Dufresne not to waste the moment. Dufresne freezes and the Man-o'War fires at The Walrus and Dufresne orders The Walrus to open fire. The Man-o'-War opens fire again and The Walrus is obliterated.
During the events of Black Sails: Season 2 Episode 9 IX. played by Alistair Moulton Black
Flint starts to tell The Walrus crew his plan. Logan angrily yells that they should be cutting Flint's lying tongue from his head and Dufresne tells the crew to listen to Flint. Flint suggests they steal the warship and then take the gold. He continues to tell his plan of sending two people to kill any sentries on the ship while the rest of the crew readies an assault. De Groot gets upset with listening to Flint's plan and Flint volunteers to be one of the men to kill the sentries and Silver volunteers to be the other. Later, Ranking Spanish Sailor looks towards the water and Joji shoots him in the head. Joshua breaks the door down where Flint and Silver are hiding and he and the rest of The Walrus crew kill the remaining Spanish crew. They then manage to steal the Spanish ship and escape.