The Washington star has been missing during the start of the season due to hip problems.
When Bäckström was back on the match last night, he assisted Alexander Ovetjkin's 1-0 goal against Chicago in the second period.
The goal came in numerical superiority, and it was the 274th time that Ovetchkin netted in powerplay in the NHL.
Thus, he touched the Canadian Dave Andreychuks (NHL career in Buffalo, Toronto New Jersey, Colorado and Tampa Bay between 1983 and 2006) record.
Then with three seconds left in the third period, Ovetchkin was behind Conor Sheary's 4-4 equalizer that took the match to extra time.
There, Caleb Jones decided for the home team Chicago.
The victory was the Blackhawks' eleventh of the season, the club being second to last in the central division.
While the Capitals are second in their behind the New York Rangers - who last night defeated Arizona 3-2 after both goals and assists by Mika Zibanejad.