Cliff's Birthday

Cliff's Birthday is the 24th and the season ending episode of Season 1 of The Cosby Show, also the 24th overall in the series. The episode was directed by Jay Sandrich and written by Elliot Shoenman and John Markus. The episodes originally aired in the United States on NBC on May 8, 1985.

Synopsis
Cliff is turning 48, and as usual, he is trying to find out what his birthday present is ahead of time. Clair, with the help of the kids, orchestrates a huge trick. Cliff is fooled, and doesn't find about what his birthday surprise is: a visit to Lena Horne's private club, where she performs "I'm Glad There Is You".

Plot summary
t's Cliff's birthday and the family tries to keep his present--going to a Lena Horne show, a secret. And Cliff will do whatever he has to to find out what his present is. And to make sure that he doesn't they don't tell the weak link--Theo what it is. .