Palmolive

Here we have Diana Weston taking time out from being Cowley's PA (The Professionals) and being married to Doctor Who's brother (The Upper Hand), to have a good soak in the bath with the aforementioned brand of toilet soap. In the background someone's having a go at the Bobby Darin hit from the 1950s (Splish Splash). Palmolive is part of the firm which also makes Colgate.