The Calculus Affair: Part 1 - S1-E12
Audio problem: After the bullet is shot at Calculus's hat, Tintin says "That sounded like a gunshot... outside". After he says "gunshot...", his mouth starts moving as if he is speaking before he even starts to say "outside". (00:06:40)
Doug's Doodle / Doug's Runaway Journal - S1-E10
Audio problem: Porkchop inserts headphones into a stereo since it's bothering Doug. The audio changes too early. You can hear the volume jump.