Mr. Monk and the End - Part I - S8-E15
Corrected entry: At the beginning of the season 8 episode "Mr. Monk and the End Pt. 1" the scene shows Monk and Trudy prior to the car bombing, together. Monk notices a new present under the tree. He mentions the present to her. However, in the season 4 episode, "Mr. Monk and the Secret Santa", he tells Natalie that he found the gift after Trudy died. Considering Monk's extraordinary gift for memory it seems unlikely that he would have forgotten how he discovered the gift.
Correction: Considering the trauma he went through that afternoon, it's perfectly understandable he would have forgotten. Add to that the fact that Trudy alters his gifts (He was never able to directly solve her murder), and his memory lapse can be totally explained.
dizzyd