httpv://www.youtube.com/watch?v=g2lH3Rz1qgw
(part one)

(Wednesday, May 6, 1981, 11:30 p.m. ET) — Former Beatle Ringo Starr and his new wife, actress Barbara Bach, appeared tonight on The Tonight Show Starring Johnny Carson at NBC Studios in Burbank, California, to promote their new film “Caveman”  On the very same program, comedian Jerry Seinfeld makes his debut on the show.

httpv://www.youtube.com/watch?v=Snn0yV32yoI
(part two)

httpv://www.youtube.com/watch?v=8I0nND1n4mk
(part three)

httpv://www.youtube.com/watch?v=rYJxcFaRpMU
(Seinfeld segment)