Question: Who was the director that directed both Jennifer Carpenter and Mattie Liptak? 

Context articles: Our Father (Dexter)
Love American Style (Dexter)
It's Alive! (Dexter)
Mattie Liptak
Quarantine (2008 film)
Quarantine 2: Terminal
The British Invasion (Dexter)
Brawl in Cell Block 99
The Factory (film)
The Damage a Man Can Do

"Our Father" is the third season premiere and twenty-fifth overall episode of the American television drama series "Dexter", which first aired on September 28, 2008 on Showtime in the United States.
 The episode was written by Clyde Phillips and directed by Keith Gordon.
 In the episode, which takes place several months after the second season finale, Dexter Morgan (Michael C. Hall) mistakenly kills an innocent man but forms a friendship with the man's brother, well-known assistant district attorney Miguel Prado (Jimmy Smits).
 Dexter's sister Debra (Jennifer Carpenter), meanwhile, has turned over a new leaf in her life and is determined to become a detective.
"Love American Style" is the fifth episode of the first season of the American television drama series "Dexter", which first aired on October 29, 2006 on Showtime in the United States.
 The episode was written by Melissa Rosenberg and was directed by Robert Lieberman.
 In the episode, Dexter Morgan (Michael C. Hall) hunts down Jorge Castillo (José Zúñiga), a human trafficker and murderer.
 His sister, Ofr.
 Debra Morgan (Jennifer Carpenter), attempts to extract information from a security guard whose limbs were amputated by the "Ice Truck Killer".
"It's Alive!"
 is the second season premiere and thirteenth overall episode of the American television drama series "Dexter", which first aired on September 30, 2007 on Showtime in the United States.
 The episode was written by Daniel Cerone and was directed by Tony Goldwyn.
 In the episode, which takes place five weeks after the first-season finale, Sgt. James Doakes (Erik King) is following Dexter Morgan (Michael C. Hall) at all times, but when he gets his first opportunity Dexter finds himself unable to kill.
 Meanwhile, his sister Debra (Jennifer Carpenter) returns to work after her ex-fiancé Brian tried to kill her, and his girlfriend Rita Bennett (Julie Benz) refuses to believe that Dexter sent her ex-husband Paul (Mark Pellegrino) to prison in spite of the evidence in front of her.
Mattie Liptak (born April 10, 1996) is an American actor best known for his role as George in the horror film, "", a sequel to the 2008 film, "Quarantine".
 He was born and raised in Walker, Louisiana to Brenda Tedder and Robert Liptak.
 Mattie graduated from Walker High School, in Walker, Louisiana in May 2014.
Quarantine is a 2008 American found-footage horror film directed and co-written by John Erick Dowdle, produced by Sergio Aguero, Doug Davison, and Roy Lee, and co-written by Drew Dowdle, being a remake of the Spanish film "REC".
 The film stars Jennifer Carpenter, Jay Hernandez, Columbus Short, Greg Germann, Steve Harris, Dania Ramirez, Rade Šerbedžija, and Johnathon Schaech.
Quarantine 2: Terminal is a 2011 American horror film and a sequel to the 2008 film, "Quarantine".
 It was written and directed by John Pogue and produced by Marc Brienstock.
 The film stars Mercedes Mason, Josh Cooke and Mattie Liptak and revolves around a mutated rabies infection outbreak in a quarantined airport and taking place the same night and nearly same time as the events of the first film.
"The British Invasion" is the twelfth episode and finale of the second season, and twenty-fourth overall episode, of the American television drama series "Dexter", which first aired on 16 December 2007 on Showtime in the United States.
 The episode was written by Daniel Cerone (based on a story by Cerone and Melissa Rosenberg) and was directed by Steve Shill.
 In the episode, Lila Tournay (Jaime Murray) finds Sgt. James Doakes (Erik King) imprisoned in an Everglades cabin and learns from him that her object of affection, Dexter Morgan (Michael C. Hall), is the serial killer known as the "Bay Harbor Butcher".
 She decides to help Dexter and kills Doakes by setting the cabin on fire.
 Meanwhile, Dexter's sister Debra (Jennifer Carpenter) questions whether her career is more important than her relationship with FBI Special Agent Frank Lundy (Keith Carradine).
Brawl in Cell Block 99 is a 2017 American action thriller film written and directed by S. Craig Zahler.
 The film stars Vince Vaughn, Jennifer Carpenter, Don Johnson, Udo Kier, Marc Blucas and Tom Guiry.
 It was screened out of competition at the 74th Venice International Film Festival.
 The film is scheduled to be released in theaters on October 6, 2017, and on digital HD and video on demand on October 13, 2017, by RLJE Films.
The Factory is a 2012 American crime thriller film directed by Morgan O'Neill and starring John Cusack, Mae Whitman, Dallas Roberts, Mageina Tovah, Cindy Sampson, and Jennifer Carpenter.
 In the film, Cusack plays a Buffalo, New York cop who has been chasing a serial kidnapper who abducts young women.
"The Damage a Man Can Do" is the eighth episode of the third season of the American television drama series "Dexter", which first aired on November 16, 2008 on Showtime in the United States.
 The episode was written by Scott Buck and directed by Marcos Siega.
 In the episode, assistant district attorney Miguel Prado (Jimmy Smits) asks Dexter Morgan (Michael C. Hall) for his assistance in killing a murderous gambler.
 Meanwhile, Dexter's sister Ofr.
 Debra Morgan (Jennifer Carpenter) finds her boyfriend and informant Anton Briggs (David Ramsey) to be missing after she tells him that he is no longer legally obligated to work for her.