Table: tv_improvisation
Columns: no
col
original_airdate
performer_1
performer_2
performer_3
performer_4

Question: What was the date that the episode with Jeff Davis as the second performer originally aired?
SQL: SELECT "original_airdate" FROM tv_improvisation WHERE "performer_2" = 'Jeff Davis'

Question: How many episodes were series episode 214?
SQL: SELECT COUNT("col") FROM tv_improvisation WHERE "no" = 214