1-Son Adam 2-Dr.Bombay 3-Esmeralda 4-Uncle Arthur 5-Frank and Phyllis Stephens 6-Gladys and Abner Kravitz 7-Serena

I'll do my best to answer these, so....

(NOTE: In posting episode numbers, I do not count the recut episodes into the episode order, so not counting the recut episodes, the total episodes are 252)

Last appearance of:

1) Adam: "School Days, School Daze" (#249- March 4, 1972)

2) Dr. Bombay: "Samantha's Wtchcraft Blows a Fuse" (#251- March 18, 1972)

3) Esmerelda: "George Washington Zapped Here (Part 2)" (#248- Feb 26, 1972)

4) Uncle Arthur: "The House that Uncle Arthur Built" (#216- Feb 18, 1971)

5) Frank and Phyllis Stephens: "Samantha and the Antique Doll" (#226- April 22, 1971)

6) Gladys Kravitz: "Laugh, Clown, Laugh" (#225- April 15, 1971)
Abner Kravitz: "Darrin Goes Ape" (#220- March 11, 1971)

7) Serena: "Serena's Youth Pill" (#245- Feb 05, 1972)