The Brady Bunch - Season 2 Episode 10 -

Cindy has become somewhat of a tattletale leading Alice to get in a fight with Sam and the other siblings leaving her out of their activities. In the end, Cindy learns there are times when she has to tell what's going on when it's "important" ... such as when Tiger doggie-swipes a claim voucher for a prize Alice won in a jingle-writing contest.