Directed by Tuck Tucker   Written by Craig Bartlett   Joe Ansolabehere   Steve Viksten   Cast Francesca Marie Smith ... Helga Pataki (voice) (as Francesca Smith) Spencer Klein ... Arnold (voice) Anndi McAfee ... Phoebe Heyerdahl (voice) Justin Shenkarow ... Harold Berman / Lil' Harold (voice) Kathy Baker ... Dr. Bliss (voice) Maurice LaMarche ... Big Bob Pataki (voice) Kath Soucie ... Miriam Pataki (voice) (as Kath E. Soucie) Nika Futterman ... Olga Pataki (voice) (as Nika) David Wohl ... Principal Wartz (voice) Dan Butler ... Mr. Simmons (voice) Rusty Flood ... Little Arnold (voice) Craig Bartlett ... Brainy (voice) Katie Bartlett ... Little Helga (voice) Produced by Craig Bartlett   Mary Harrington   Joseph Purdy   Donna Smith   Steve Socki   Steve Viksten   Original Music by Jim Lang

Additional Info Premiere: December 04, 1999 DVD Release: November 27, 2009 Country: Distributor: Shout! Factory Websites: Production Companies Nicktoons Productions Nubian Nights Worldwide Games Animation (seasons 1-3) Nickelodeon Animation Studios (seasons 4-5) Nickelodeon Network Nicktoons Productions (1996-2004) Snee-Oosh Productions Distributors Nickelodeon Network   (1996-2004) (USA) (TV) CBS All Access   (2020) (USA) (video) (VOD) CBS   (2001) (USA) (TV) Nickelodeon   (USA) (TV) Paramount Home Entertainment   (1997) (USA) (VHS) Paramount Home Entertainment   (2001) (USA) (DVD) Shout! Factory   (2011) (USA) (DVD) (season one) Shout! Factory   (2012) (USA) (DVD) (Season Two, Parts One and Two) Rating Stats Overall Rating -- / 10 Our Rating -- / 10 Your Friends -- / 10 Male Users -- / 10 Female Users -- / 10 Site Ranking #2,876 / 21,263 Site Ranking