As this season of The Big Bang Theory reaches its finale, the popular CBS sitcom might finally be introducing one of the show's unseen characters.

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Howard's (Simon Helberg) mother Mrs. Wolowitz has been a character that has only been heard, not seen. However, it's possible that this could change, according to a new spoiler report by E! Online.

The report reveals that viewers will be introduced to Marta, who is the woman tasked with taking care of Mrs. Wolowitz. Reportedly, viewers will be grateful for what Marta reveals at the end of the episode.

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In other Big Bang Theory spoiler news, there will be another new character introduced by the end of the season. The character is Kelton, a "cute-ish" man with tattoos who runs into Sheldon Cooper (Jim Parsons) and Raj Koothrappali (Kunal Nayyar).

The next episode of The Big Bang Theory is titled The Anything Can Happen Recurrence. In the episode, Sheldon attempts to be "spontaneous" which leads to some "friction" between Penny (Kaley Cuoco), Amy (Mayim Bialik) and Bernadette (Melissa Rauch).

Meanwhile, Raj (Kunal Nayyar) finds find himself needing Howard's help as he prepares for his date with Emily (Laura Spencer).

Actress Carrol Ann Susi, who has voiced Mrs. Wolowitz over the course of the series, is slated to guest star in the episode.

The Big Bang Theory season 7 airs Thursdays at 8 p.m. on CBS.

See new promotional photos for the next episode of The Big Bang Theory here: