As with most TV movies that are effectively a story arc, "In the Beginning" is only attractive to fans of the series. But for these people, this movie adds critical background information only hinted at in the series, and as well, casts one of the significant characters of the show into a different light. Now we can see a little of why the first four Babylon stations were destroyed, and how Sinclair and then Sheridan were fated to be the keystones in the development of Earth-Mimbari relations.
Finally the linked histories of Delenn, Sincliar and Sheridan that are alluded to throughout the series are explained, revealing some of the deep background created by J. Michael Straczynski that helped add to the series strength. The acting is well crafted, highlighting the depth of skills in their craft of the major cast. What I found particularly intriguing was the manner in which Straczynski rounded out the character of Llando by having him slightly distort the historical events covered in the series (only apparent to someone who had paid particular attention to the original TV screening).