Fischer gave Detroit a 1-0 lead at 11:15 of the second period on a breakaway. He slid the puck between Sorokin’s legs after taking a pass from Michael Rasmussen.
Reilly tied it 1-1 at 13:25 when his long wrist shot trickled through Reimer’s pads.
Copp put the Red Wings back ahead 2-1 at 16:00, ending a 20-game goal drought by tapping in a rebound after Sorokin stopped Fischer’s shot.
Larkin extended it to 3-1 at 18:08 with a one-timer off Alex DeBrincat’s pass.
“He means everything to this team,” Fischer said of Larkin. “He’s a true No. 1 center, which is really hard to find, and you could see every guy competing a little harder just having [Larkin] back out there.”
Copp pushed it to 4-1 at 5:12 of the third period with his second goal, putting in another rebound.
Patrick Kane made it 5-1 at 6:22 with a one-timer on the rush.
“That was definitely unacceptable,” Reilly said. “We came in after the second period and said, ‘Let’s go out and win the period and just see what happens.’ Obviously, we can’t go out and start the period like that.”