Lily Tomlin's very funny 40-year search for signs of intelligent life in the universe has landed her the Kennedy Center's sixth Mark Twain Prize for humor, which she receives in this gala, taped Oct. 26, 2003. Among the notables paying tribute: Dolly Parton, Steve Martin, Whoopi Goldberg Robin Williams, Eve Ensler, Miss Piggy, Elaine Stritch. Included: clips of Tomlin's signatures roles; scenes from movies; outtakes from her "Search for Signs of Intelligent Life in the Universe" Broadway show.