There's a Labor Day Weekend marathon of 5th Grader currently airing on FOX Reality. For Saturday, it's on from now until 7 pm, then 1 am to 3 am and 4 am to 5 am. Sunday is 10 am to 5 pm, then 9 pm to midnight. Monday will be 9 am to 1 pm and 5 pm to 9 pm. It looks like it's a mix of civilian episodes and some of the celebrity games they played.
All times Eastern.