Short answer: For tonight’s Strictly Come Dancing, the typical format is a live Saturday main show followed by a Sunday results episode, with the exact start times varying by week. What to expect tonight

• Saturday: The main entertainment/dance segment usually runs in the early evening, often starting between 6:00 PM and 6:30 PM UK time, and lasts about 1 hour 30 minutes to 2 hours.
• Sunday: The results show typically airs in the late prime evening slot, commonly around 7:10 PM UK time, and runs for roughly 40–50 minutes.

Because start times shift week to week, the most reliable approach is to check BBC One’s schedule for your local region or BBC iPlayer listings for tonight, and confirm the specific start time and duration for the exact date. If you’d like, I can look up the current official schedule for tonight and provide the precise start time and run length.