[python] Convert Pandas Series to DateTime in a DataFrame

I have a Pandas DataFrame as below

        ReviewID       ID      Type               TimeReviewed
205     76032930  51936827  ReportID 2015-01-15 00:05:27.513000
232     76032930  51936854  ReportID 2015-01-15 00:06:46.703000
233     76032930  51936855  ReportID 2015-01-15 00:06:56.707000
413     76032930  51937035  ReportID 2015-01-15 00:14:24.957000
565     76032930  51937188  ReportID 2015-01-15 00:23:07.220000

>>> type(df)
<class 'pandas.core.frame.DataFrame'>

TimeReviewed is a series type

>>> type(df.TimeReviewed)
<class 'pandas.core.series.Series'>

I've tried below, but it still doesn't change the Series type

import pandas as pd
review = pd.to_datetime(pd.Series(df.TimeReviewed))
>>> type(review)
<class 'pandas.core.series.Series'>

How can I change the df.TimeReviewed to DateTime type and pull out year, month, day, hour, min, sec separately? I'm kinda new to python, thanks for your help.

df=pd.read_csv("filename.csv" , parse_dates=["<column name>"])

type(df.<column name>)

example: if you want to convert day which is initially a string to a Timestamp in Pandas

df=pd.read_csv("weather_data2.csv" , parse_dates=["day"])

type(df.day)

The output will be pandas.tslib.Timestamp

Some handy script:

hour = df['assess_time'].dt.hour.values[0]