Kaley Cuoco and Johnny Galecki ... “The Big Bang Theory.” The series followed best friends, roommates and physicists Sheldon Cooper (Jim Parsons), Leonard Hofstadter (Galecki) and Howard ...

The Big Bang Theory never really comes to an end and former stars of the show, Kaley Cuoco and Johnny Galecki, are back together again to remind us of that. Cuoco, who starred as Penny ...