Table:
text: List of TVB series (2008)
Third line series
Third line series
Airing_date English_title_Chinese_title Number_of_episodes HD_format Highest_average_point_ratings Genre Official_website
30 Jun- 25 Jul Love Exchange 疑情別戀 20 Yes 32 Modern thriller Official website
28 Jul- 21 Sep Moonlight Resonance 溏心風暴之家好月圓 40 Yes 47 Modern drama Official website
22 Sep- 18 Oct Last One Standing 與敵同行 21 Yes 31 Modern suspense Official website
20 Oct 2008- 13 Feb 2009 The Gem of Life 珠光寶氣 82 Yes 32 Modern drama Official website

text: List of TVB series (2008)
Third line series
Third line series
Airing_date English_title_Chinese_title Number_of_episodes HD_format Highest_average_point_ratings Genre Official_website
24 Dec 2007- 18 Jan 2008 Survivor`s Law II 律政新人王II 20 No 31 Modern drama Official website
21 Jan- 15 Feb The Gentle Crackdown II 秀才愛上兵 20 No 32 Costume comedy Official website
18 Feb- 15 Mar The Seventh Day 最美麗的第七天 20 No 34 Modern romance Official website
17 Mar- 18 Apr D.I.E. 古靈精探 25 No 37 Modern action Official website
21 Apr- 16 May Catch Me Now 原來愛上賊 20 Yes 33 Modern action Official website
19 May- 27 Jun Forensic Heroes II 法證先鋒II 30 No 34 Modern suspense Official website

Question: What was the highest average score for a 21-episode modern suspense show for TVB series in 2008 among the following: Third-line series?