Fox got great returns in reuniting the cast of “Star Trek: The Next Generation” in Sunday’s episode of the animated comedy “Family Guy.” Ratings for the episode, which also included Meg’s exploration of God and Kirk Cameron, drew 8.2 million viewers between the ages of 18 and 49, a key advertising demographic, according to TV Week. That’s up more than 14 percent from the week before, and was the highest rated episode of “Family Guy” since November. It was by far the highest-rated program in Fox’s Sunday animation block, beating out “The Simpsons” at 8 p.m. ET with 6.6 million viewers and “American Dad,” which followed at 9:30 p.m ET with just 6 million viewers in the demographic. The episode is said to be the first full cast reunion in more than 15 years when the series finale …