CHAOS ENSUES WHEN LEONARD'S RECENTLY DIVORCED PARENTS AND SHELDON'S DEVOUTLY RELIGIOUS MOTHER COMES TO TOWN, ON THE NINTH SEASON FINALE OF "THE BIG BANG THEORY," THURSDAY, MAY 12

Emmy Award Winner Judd Hirsch Guest Stars as Leonard's Father, Alfred

Christine Baranksi Returns as Leonard's Mother, Beverly and Laurie Metcalf Returns as Sheldon's Mother, Mary

"The Convergence Convergence" - Chaos ensues when Leonard's recently divorced parents, Alfred (Judd Hirsch)
and Beverly (Christine Baranski)
, and Sheldon's devoutly religious mother, Mary (Laurie Metcalf)
, come to town. Also, Wolowitz and Koothrappali think the government is out to get them when they are contacted about their guidance system, on the ninth season finale of THE BIG BANG THEORY, Thursday, May 12 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

REGULAR CAST

Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:

Christine Baranski (Beverly)
Laurie Metcalf (Mary)

GUEST CAST:

Judd Hirsch (Alfred)
Marcus Folmar (Police Officer)

WRITTEN BY: Steven Molaro & Tara Hernandez & Adam Faberman

TELEPLAY BY: Chuck Lorre & Steve Holland & Jeremy Howe

DIRECTED BY: Mark Cendrowski