The Cast Of The Big Bang Theory Outside Of The Sitcom

The Big Bang Theory has been making audiences laugh since its premiere in 2007, when we were first introduced to the geeky but brilliant crew of CalTech researchers and their neighbor, Penny. After 10 years on the air, here's what the cast looked like then and now.

When Stephanie was introduced, she was yet another woman Howard was trying to make a move on. A sassy surgical resident at Fremont Memorial Hospital, she has no interest in Howard, but sets her sights on Leonard instead. Though Howard was initially upset, Leonard and Stephanie proceed to get into a serious relationship, until Leonard realizes that she has essentially moved into his room little bit little. Leonard ends the relationship by dumping her over text message.

Sara hasn't appeared on The Big Bang Theory since she and Leonard broke up in 2008, but she has been working consistently on television ever since. She spent three years playing Brenda on Rules of Engagement between 2010 and 2013, followed by a run on Mom as Candace. From 2015 to 2017, Sara played Karen Delfs on Bones, which just wrapped recently. Next year, she will appear in a number of episodes of the Netflix show, A Series of Unfortunate Events as the Librarian.

The character of Alex is introduced as a doctoral student placed with Sheldon as a research assistant, but Sheldon often gave her busy work, rather than actually allowing her to help him. When he brings her back to the gang with him, she develops a noticeable crush on Leonard, which Penny takes note of, though Leonard remained oblivious. She eventually tries to ask Leonard out, but he maintains his fidelity to Penny and turns her down.

Prior to her run on The Big Bang Theory, Margo Harshman was a regular on the Disney Channel show, Even Stevens, when she played Louis Stevens's friend, Tawny Dean. Margo has been working consistently since she finished her arc on The Big Bang Theory. Her most notable role since then has been Delilah Fielding on NCIS, a run which began in 2013 that is ongoing as of this year. This year she also appeared in Love on the Vines as Diana Armstrong.