From episode 2x15 "Mr. Monk Gets Married".
From episode 8x03 "Mr. Monk and the UFO".
From episode 3x03 "Mr. Monk and the Blackout".
Dora watches Monk eat from across the street. From episode 4x11 "Mr. Monk Bumps His Head".
From episode 6x03 "Mr. Monk and the Naked Man".
From episode 7x09 "Mr. Monk and the Miracle".
From episode 8x01 "Mr. Monk's Favorite Show".
Source: I Am Not a Stalker