playing Sheldon's "friend that's a girl, but not a girlfriend." Beginning with the 8th episode of season4, she became part of the main cast. Amy is a neurobiologist, which is related to Bialik's real-life doctorate in neuroscience. Bialik's performance in The Big Bang Theory earned her Emmy Award nominations in 2012, 2013, 2014, and 2015 for Outstanding Supporting Actress in a Comedy Series. Bialik was one of seven actresses who had a "quirky" personality to audition for the role. Before she joined the cast, in the episode "The Bat Jar Conjecture", Raj suggests recruiting the real-life Bialik to their Physics Bowl team, saying "You know who's apparently very smart is the girl who played TV's Blossom. She got a Ph.D. in neuroscience or something." She is one of the guest stars on the 2014 Steve Carell improvisational sketch show Riot. In August 2014, Bialik began hosting a revival of Candid Camera on TV Land along with Peter Funt. Her most recent movie appearance was in a Lifetime Christmas movie, The Flight Before Christmas. In 2019, Bialik appeared in a commercial for IBM. On August 20, 2019, it was announced that she and her new production company, Sad Clown Productions, had signed exclusive contracts with Warner Bros. Entertainment. Mackenzie Gabriel-Vaught, a former executive at Chuck Lorre Productions, is Sad Clown's head of development. Sad Clown Productions, in conjunction with Jim Parsons's That's Wonderful Productions, BBC Studios, and Miranda Hart, executive-produces a starring vehicle for Bialik, Call Me Kat, based on the British series Miranda. A co-production of Warner Bros. and Fox Entertainment, it premiered on Fox on January 3, 2021 and was renewed for a second season in May 2021. From May 31 to June 11, 2021, Bialik was a guest host of Jeopardy! On August 11, 2021, it was announced that she would host the series' future primetime specials and spinoffs. When executive producer Mike Richards resigned as host after one week, it was announced that Bialik would guest-host the show for three weeks. Her contract was extended to seven weeks; she would then alternate with Ken Jennings for the rest of the calendar year. On December 8, 2021, it was announced that Bialik and Jennings would continue to host the show for the rest of the 2021–22 season. On July 27, 2022, it was announced that Bialik and Jennings would be the show's permanent hosts in a job-sharing arrangement.