Popular comedy series The Big Bang Theory is coming to an end. The show will reportedly wrap up after Season 12. Tensions began after series' eleventh season got poor ratings. Sources close to the show state that the makers are now contemplating on shutting the show altogether. “Many of the cast members have gotten swelled heads. Some of the other actors aren’t happy about it,” the source was quoted as saying by radaronline.com. Tension has been brewing between Jim Parsons, Kaley Cuoco and Johnny Galecki ever since Parsons got himself a gig on The Big Bang Theory spin-off Young Sheldon as a narrator. Galecki is also allegedly “silently simmering” over Parsons’ status as TV’s highest paid star, earning $27.5 million a year.