Wikipedia
"FZZT" is the sixth episode of the first season of the American television series Agents of S.H.I.E.L.D., based on the Marvel Comics organization S.H.I.E.L.D. (Strategic Homeland Intervention, Enforcement and Logistics Division), revolving around the character of Phil Coulson and his team of S.H.I.E.L.D. agents as they investigate a series of deaths caused by an alien virus. It is set in the Marvel Cinematic Universe (MCU), sharing continuity with the films of the franchise. The episode was written by Paul Zbyszewski, and directed by Vincent Misiano.
Clark Gregg reprises his role as Coulson from the film series, and is joined by series regulars Ming-Na Wen, Brett Dalton, Chloe Bennet, Iain De Caestecker, and Elizabeth Henstridge. The episode draws comparisons to the plight of first responders to the September 11 attacks by showing firefighters (with guest star Vincent Laresca playing one) dying as a consequence of responding to the Battle of New York, as seen in Marvel's The Avengers. The episode also features a major skydiving sequence, realized by combing live footage with CGI, as part of the development of the characters Fitz and Simmons, who received their own musical theme for the episode. It also sees Titus Welliver reprise his S.H.I.E.L.D. agent role from the Marvel One-Shot short films.
"FZZT" originally aired on ABC on November 5, 2013, and according to Nielsen Media Research, was watched by 10.93 million viewers within a week of its release. The episode received a positive critical response, with the character development praised, especially that of the characters Fitz and Simmons.