“Chuck” will end its third season the same way it started: with two hours of spy action comedy.

NBC has set season finale dates for most of its lineup, and the list includes a two-hour sendoff for “Chuck” on Monday, May 24. The show should know its fate by then — NBC’s upfront, where it announces the schedule for 2010-11, is a week earlier on May 17.

“Chuck” will be joined on May 24 by the season finale of “Law & Order” at 10 p.m.

Here are all the May finales NBC has announced. “Heroes” finishes its season Monday (Feb. 8), while “Parenthood,” “The Marriage Ref” and “Friday Night Lights” don’t have dates yet.

Monday, May 10

9 p.m. “Trauma”

Wednesday, May 12

8 p.m. “Mercy”

Wednesday, May 19

10 p.m. “Law & Order: SVU”

Thursday, May 20

8 p.m. “Community”
8:30 p.m. “Parks and Recreation”
9 p.m. “The Office”
9:30 p.m. “30 Rock”

Sunday, May 23

9 p.m. “The Celebrity Appentice”

Monday, May 24

8 p.m. “Chuck” (two hours)
10 p.m. “Law & Order”

Tuesday, May 25

8 p.m. “The Biggest Loser”