The Firefly (Fringe)

"**The Firefly**"
"The Firefly"
Fringe episode
Episode no.	Season 3; Episode 10
Directed by	Charles Beeson
Written by	J. H. Wyman; Jeff Pinkner
Production code	3X6110
Original air date	January 21, 2011
Guest appearances
	Christopher Lloyd as Roscoe Joyce; Michael Cerveris as The Observer; Nick Ouellette as Bobby Joyce; Eugene Lipinski as December; David Quinlan as Joe; Olivia Cheng as Victoria DiMiri; Marci T. House as Pam;
Episode chronology
← Previous; "Marionette"	Next →; "Reciprocity"
	Fringe season 3
	List of episodes

"The Firefly" is the 10th episode of the third season of the American science fiction drama television series Fringe, and the 53rd episode overall. The episode centers on a chain of events created by Walter's crossing over into the parallel universe in 1985 that has had subtle but significant effects in the present. Christopher Lloyd guest-starred as retired rocker Roscoe Joyce.

As the first episode in its new Friday time slot, "The Firefly" aired on January 21, 2011, in the United States to 4.88 million viewers, outperforming the previous episode "Marionette" Thursday night viewership by 18%. Time shifted viewership added 42% in its ratings. It received generally positive reviews, with many praising the storyline as "elegant" and "beautiful."