Heard half of a commercial tonight - with Phil and at the end it just said Tuesday, so it may be tomorrow (12/1) (which makes sense as they've been running double episodes of the race on Wed. so likely not a spot to put it there)?
The CBS schedule is listing 9pm Eastern tonight for LMaD
The Amazing Race is slated to end two weeks from tomorrow (Wednesday, December 16). Even without all of the double episodes (meaning one 60-minute episode throughout most or all of the season leading up to the end), the show typically ends with a 2-hour season finale. CBS surrounds that with comedy, drama, or action (previously 60 Minutes when TAR was on Sunday).
So yeah, no Phil LMAD episode to air prior to the show, but his appearance would promote it, obviously. On the other hand, he could be on to promote Tough As Nails
