It's the first game out of the Olympic break for each team.
Couture hasn't played since Jan. 5 because of a hand injury which required surgery. He had a five-game point streak when he came out of the lineup, including goals in four straight games from Dec. 29-Jan. 4. He'll center the second line between Patrick Marleau and Marty Havlat.
"Last night, it was difficult going to sleep just thinking about how exciting it is to get out and play in an NHL game again," Couture said Thursday, according to CSNBayArea.com. "It feels like I haven't played in like three years."
Torres will be making his season debut after injuring his knee in a preseason game against the Anaheim Ducks. He'll play left wing on the third line with center Andrew Desjardins and right wing Tyler Kennedy.
Torres had two goals and six points in 11 regular-season games and a goal in five Stanley Cup Playoff games after being acquired from the Phoenix Coyotes at the 2013 NHL Trade Deadline.
"We've been waiting for the health of our team to improve. When you can bring [Couture and Torres] back into the lineup, that’s a very welcome thing," coach Todd McLellan said.
Forward Tomas Hertl skated Thursday for the first time since sustaining a knee injury Dec. 19 against the Los Angeles Kings. Hertl reported no pain in the knee, but there is no timetable for his return.
Steve Mason will be in goal for the Flyers, who are third in the Metropolitan Division and seventh in the Eastern Conference with 66 points.
Here's how the lines could look when the Sharks face the Flyers:
Scratched: Kimmo Timonen