Question: What actor was teacher in a Nickelodeon sitcom about two girls who become roommates and start a babysitting service?

Context articles: Excellence in Broadcasting
Sam &amp; Cat
Nana (manga)
Eric Lange
The Babysitters
List of Chivalry of a Failed Knight episodes
Ashley Argota
A Novel Romance
List of Sam &amp; Cat episodes
I, Roommate

"Excellence in Broadcasting" is the second episode of the ninth season of the animated comedy series "Family Guy".
 It originally aired on Fox in the United States on October 3, 2010.
 The episode features anthropomorphic dog Brian, an adamant liberal, confronting conservative radio talk show host Rush Limbaugh at a book signing in Quahog, and ultimately having a political change of heart when Limbaugh convinces him to read his latest book.
 Brian eventually decides to become a devoted member of the Republican Party, and soon begins criticizing liberals.
 This leads Brian to become roommates with Limbaugh, and begins following him everywhere, before Limbaugh convinces Brian of his true political convictions.
Sam & Cat is an American teen sitcom that originally aired from June 8, 2013, to July 17, 2014, on Nickelodeon.
 It is a crossover spin-off/sequel of both "iCarly" and "Victorious".
 It stars Jennette McCurdy as Sam Puckett and Ariana Grande as Cat Valentine.
 The girls meet by chance during a bizarre adventure and become roommates, then start a babysitting business to earn extra money.
 The series was picked up for 20 episodes on November 29, 2012.
 It began filming in January 2013 and premiered on June 8, 2013.
 The first season was doubled to 40 episodes on July 11, 2013.
Nana (ナナ ) is a Japanese manga series written and illustrated by Ai Yazawa.
 It was serialized in "Cookie" magazine from July 2000 until June 2009 when it went on indefinite hiatus, with its chapters collected into 21 "tankōbon" volumes published by Shueisha.
 The series derives its title from the name of the two main characters, both of whom are called Nana.
 Nana Komatsu is a small town girl who goes to Tokyo to follow her boyfriend and college friends, with the hope of having her dream life.
 Nana Osaki was in a popular punk rock band in her hometown.
 She goes to Tokyo with the goal of making it big as a singer.
 The two Nanas meet on the train ride to the city.
 Later, they run into each other again when they happen to check out the same apartment, and the girls decide to become roommates.
 The series chronicles their friendship and their lives as each chases her dreams.
Eric Lange (born February 19, 1973) is an American television and movie actor, best known for his roles as Erwin Sikowitz, an acting teacher from the television show "Victorious", as Stuart Radzinsky on the ABC television series "Lost", as CIA Station Chief Bill Stechner on "Narcos", and as David Tate/Kenneth Hasting on FX's "The Bridge".
 He has also made an appearance reprising his role as Sikowitz on the crossover spin-off comedy "Sam & Cat".
The Babysitters is a 2007 independent drama film directed by David Ross.
 It stars Katherine Waterston, John Leguizamo, and Cynthia Nixon.
 The story follows a teenager who turns her babysitting service into a call girl service for married men after fooling around with one of her customers.
"Chivalry of a Failed Knight" is an anime series adapted from the light novels of the same title by Riku Misora and Won.
 Produced by Silver Link and Nexus and directed by Shin Ōnuma, the series adapts the first three volumes of the light novels.
 Focusing on the adventures of Hagun Academy's F-Rank Blazer Ikki Kurogane, he is challenged to a mock duel with A-Rank Blazer Stella Vermillion after he walks in on her changing in his room.
 After the duel, they eventually become roommates and training partners, intent on competing as Hagun's representatives in the annual Seven Star Sword Art Festival.
Ashley Argota (born January 9, 1993) is an American actress and singer.
 She is known for roles on television, such as Lulu on the Nickelodeon sitcom "True Jackson, VP", and Kelly Peckinpaugh on the Nickelodeon sitcom "Bucket & Skinner's Epic Adventures".
A Novel Romance is a 2011 comedy-drama film about a chance meeting between two strangers that leads the unlikely pair to become roommates, and despite their differences, the two eventually realize that they have spent all their lives waiting for one another.
 The film is produced by Morris S. Levy and directed by Allie Dvorin.
 It stars Steve Guttenberg, Milena Govich and Shannon Elizabeth, with cinematography by Jon Miguel Delgado, editing by Glenn Conte, and a musical score by Michelangelo Sosnowitz.
"Sam & Cat" is an American sitcom that originally aired on Nickelodeon from June 8, 2013 to July 17, 2014.
 It is a crossover/spin-off and sequel of both "iCarly" and "Victorious".
 It stars Jennette McCurdy and Ariana Grande as Sam Puckett and Cat Valentine respectively.
 The series is based on both these girls as they buddy up as roommates and start a babysitting business to fund their adventures.
 In March 2014, sources at Nickelodeon differed over whether "Sam & Cat" would be renewed for a second season, but on July 2, 2014, a promotional video on Nickelodeon stated that there were two episodes left, and on July 13, Nickelodeon announced that "Sam & Cat" was officially cancelled after just one season.
"I, Roommate" is the third episode of season one of "Futurama".
 It originally aired on the Fox network in the United States on April 6, 1999.
 The episode was written by Eric Horsted and directed by Bret Haaland.
 The plot focuses on Fry and Bender's search for an apartment after deciding to become roommates and the various difficulties they have in finding a place that is acceptable to both of them.