123 Sesame Street was a slot of "newer" episodes shown on Noggin. It aired from 1999 to 2005. When this series began, only the first 65 episodes from season 25 were included. In 2003, they were replaced with episodes from seasons 30 andd 31.
Season 25 package (1999-2003)
- Episode 3136 -- Season Premiere: Around The Corner
- Episode 3137
- Episode 3138
- Episode 3139 -- Susan and Gordon stay at the Furry Arms Hotel
- Episode 3140
- Episode 3141
- Episode 3142
- Episode 3143
- Episode 3144
- Episode 3145
- Episode 3146
- Episode 3147
- Episode 3148
- Episode 3149
- Episode 3150
- Episode 3151
- Episode 3152
- Episode 3153
- Episode 3154 -- Little Boy Blue's horn
- Episode 3155
- Episode 3156
- Episode 3157
- Episode 3158
- Episode 3159
- Episode 3160
- Episode 3161 -- Wolfgang chases Wanda Cousteau
- Episode 3162
- Episode 3163
- Episode 3164 -- Slimey's errands
- Episode 3165
- Episode 3166
- Episode 3167
- Episode 3168
- Episode 3169
- Episode 3170
- Episode 3171
- Episode 3172
- Episode 3173
- Episode 3174
- Episode 3175
- Episode 3176
- Episode 3177
- Episode 3178
- Episode 3179
- Episode 3180
- Episode 3181
- Episode 3182
- Episode 3183
- Episode 3184
- Episode 3185
- Episode 3186
- Episode 3187
- Episode 3188
- Episode 3189 -- Around The Corner (repeat)
- Episode 3190
- Episode 3191
- Episode 3192
- Episode 3193
- Episode 3194
- Episode 3195
- Episode 3196
- Episode 3197
- Episode 3198
- Episode 3199
- Episode 3200 -- Slimey's Birthday
- Episode 3238
Season 30/Season 31 package (2003-2005)
(incomplete)
- Episode 3788 -- The World's Longest Game of Hide and Seek
- Episode 3789 -- Zoe gets her Zoemobile
- Episode 3796
- Episode 3799
- Episode 3810 -- Prairie Dawn directs a Best Friends Pageant
- Episode 3816 -- Baby Bear's baby cousin visits
- Episode 3817
- Episode 3820 -- Elmo writes a story
- Episode 3821
- Episode 3833
- Episode 3835
- Episode 3839
- Episode 3885
- Episode 3900