Here are mine:
A - the ape on the train
B - "Letter B" by the Beetles
C - tie between the oversized canary cartoon and the one with the candle blowing out the man
D - "Daddy Dear"
E - "See...me...eating a peach..."
F - Frances the Fairy
G - Gorilla in the man suit (I know I hated that as a kid, my how times change
)
H - Mad scientist invents capital H
I - tie between "Capital I" and the infamous "steel-beam" segment
J - country "J" song/cartoon
K - Karen the Kangaroo
L - "REBEL L!!!" by Billy Idle
M - Tie between the "M" chorus conductor and the M who comes to dinner
N - "The Letter N" by Nick Normal and the Nickmatics!!!
O - the one where the weird-lookin' man drains the orange (and the orange sighs!!)
P - p for painting (??) (SS didn't do too many segments about the letter "P")
Q - "That funny lookin' thing"!!
R - Gordon voiceover segment with the running "R" (set to new-wave type music)
S - "Sammy the Snake"
T - T for Television
U - "When I'm Calling U" by Jeanette and Nelson, a Muppet couple
V - ahhh...so many for this letter - "Villain In the Panama Hat", "V Hurt My Knee", "V for Vitamins (Vim and Vigor)", the "V" segment with the boy and the van, Violet and the "V" poem, the psychedelic "V" cartoon (with viking, valentine, and vegetable), and of course "Virgil Veep" (ironic considering V doesn't begin too many words and my REAL favorite letter is "S")
W - tie between the one with the Muppet cops and "Wanda the Witch"
X - the one with the Salvador Dali-esque animation and Nick Drake-ish background music with the kid repeatedly saying "X"
Y - Yellow Yahoo
Z - "ZZ Blues" by Over the Top!!