Complex sentence: In the advert, the TARDIS is shown to be on an ice sheet, similar to imagery used in the background on the homepage of the official Doctor Who website's homepage in the run-up to the start of Season 2.
Split into simpler sentences: In the advert, the TARDIS is shown to be on an ice sheet. This imagery is similar to that used in the background of the homepage of the official Doctor Who website in the run-up to the start of Season 2.