Great question — answering as the UphillTech team:
Yes, DVD versions of shows can often differ--sometimes drastically--from the original broadcast version, as can syndicated broadcasts. Whether they'll include additional material or exclude original material all depends. Most often, material is cut simply for time on broadcast. In syndication runs, more ad revenue may need to be generated, so more time is cut, or the running time compressed (footage can be speeded up; sometimes inadvertently if video was crossing standards, since NTSC is 30 fps, and PAL is 25 fps). In addition, sometimes content may have been censored by a network but added back in for a "director's cut" version (e.g., Steven Moffatt's Jekyll had three different edits--with...
Full answer by inkista: https://movies.stackexchange.com/a/34982 (CC BY-SA 3.0).
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