Simon Helberg

Thursday's TV highlights: The CW's 'Riverdale' on KTLA

Thursday's TV highlights: The CW's 'Riverdale' on KTLA

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The Big Bang Theory Howard and Bernadette (Simon Helberg, Melissa Rauch) struggle with leaving their baby in day care, while Bert (Brian Posehn) introduces his new girlfriend (April Bowlby). 8 p.m. CBS

Trial & Error Larry’s (John Lithgow) daughter (Krysta Rodriguez) becomes a suspect in the murder one month into the trial and Josh (Nicholas D’Agosto) wants to put her on the witness stand, but Larry won’t allow it. Sherri Shepherd, Steven Boyer and Jayma Mays also star in this new episode of the legal comedy. 8 p.m. NBC

Supernatural Sam and Dean (Jared Padalecki, Jensen Ackles) investigate the case of a...

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