The last Steven Spielberg tv show “Terra Nova” bombed and was pulled during season 1. The new show has Halle getting knocked up by an alien.... yeah that should be a comedy. I think Mork & Mindy already used that idea.
He has had a few successes in tv
1995-1998 Pinky and the Brain (TV Series) (executive producer - 70 episodes) ... 1990-1992 Tiny Toon Adventures (TV Series) (executive producer - 98 episodes) ...
Spielberg was executive producer of both shows. He wasn’t a line producer, director, or writer.
As far as Terra Nova reviews go, the first few episodes got good reviews, then the show went downhill for a while, before finishing with strong reviews.
One of the key factors in the cancellation of the show was its huge budget.