question: In what episode was the character in "Buffy the Vampire Slayer" who was also portrayed by the actor who played John Hawkes in "Underground" introduced?
answer: "The Freshman"
context: Title: List of minor Buffy the Vampire Slayer characters
  Passage: Buffy the Vampire Slayer is an American franchise which spans several media and genres.  It began in 1992 with the film "Buffy the Vampire Slayer", written by Joss Whedon and directed by Fran Rubel Kuzui, and was resurrected as the television series, "Buffy the Vampire Slayer" in 1997.  The show's popularity caused it to spawn a multitude of Expanded Universe tie-in material such as comic books, novels, and video games, as well as a spin-off program entitled "Angel".  In 2007, four years after the television series' seventh and final season, "Buffy the Vampire Slayer" was officially continued in the comic book "Season Eight".  The following is a list of minor recurring characters who appear in the franchise.
  Title: Buffy Summers
  Passage: Buffy Anne Summers is the titular character from the "Buffy the Vampire Slayer" franchise.  She first appeared in the 1992 film "Buffy the Vampire Slayer" before going on to appear in the television series and subsequent comic book of the same name.  The character has also appeared in the spin-off series "Angel", as well as numerous non-canon expanded universe material, such as novels, comics, and video games.  Buffy was portrayed by Kristy Swanson in the film, and later by Sarah Michelle Gellar in the television series.  Giselle Loren has lent her voice to the character in both the "Buffy" video games and an unproduced animated series, while Kelly Albanese lent her voice to the character in the "Buffy the Vampire Slayer Season Eight" motion comics.
  Title: Buffy the Vampire Slayer: Chaos Bleeds
  Passage: Buffy the Vampire Slayer: Chaos Bleeds is a 2003 video game and the fourth of the "Buffy the Vampire Slayer" franchise, and the only multiplatform game.  It was the first to allow players to control characters other than Buffy Summers and feature a fully developed multiplayer mode; additional players had a limited ability to interact in a hidden debugging mode in the previous game, "Buffy the Vampire Slayer".
  Title: Riley Finn
  Passage: Riley Finn is a fictional character created by Joss Whedon for the television series "Buffy the Vampire Slayer".  Portrayed by Marc Blucas, Riley was introduced in the 1999 season four premiere episode, "The Freshman", and Blucas was part of the series credited cast for the second part of season four and the first part of season five.  Most notably, Riley is one of three long-term romantic interests for series' heroine Buffy Summers (Sarah Michelle Gellar).
  Title: Dawn Summers
  Passage: Dawn Summers is a fictional character created by Joss Whedon and introduced by Marti Noxon and David Fury on the television series "Buffy the Vampire Slayer", portrayed by Michelle Trachtenberg.  She made her debut in the premiere episode of the show's fifth season and subsequently appeared in every episode of its remaining three seasons.  Within the series, Dawn is the little sister of main character Buffy Summers (Sarah Michelle Gellar), a girl chosen by fate to be a vampire Slayer.  Whedon introduced Dawn to the series because he wanted to introduce a character with whom Buffy could have an intensely emotional non-romantic relationship.
  Title: Marc Blucas
  Passage: Marcus Paul "Marc" Blucas (born January 11, 1972) is an American actor, known for playing Riley Finn in "Buffy the Vampire Slayer", Matthew Donnelly in "Necessary Roughness" and recently, abolitionist John Hawkes in "Underground".  Prior to his acting career, he was known for playing college basketball with the Wake Forest Demon Deacons.
citations: Riley Finn Marc Blucas